This study explored the chemical constituents of the aerial part of Hypericum curvisepalum. Sixteen compounds were isolated from the 95% ethanol extract of H. curvisepalum with various chromatographic techniques, including a new prenylated phenyl polyketide, mysorenone D(1). Other compounds were mysorenone-A(2), mysorenone-C(3), mysorenone-B(4), peplidiforone A(5), 4-methoxy-3-(2-methylbut-3-en-2-yl)-6-phenyl-2H-pyran-2-one(6), hyperenone-A(7), 4-(3,3-dimethylallyl)oxy-6-phenyl-α-pyrone(8), peplidiforone B(9), elegaphenone(10), hypercohin A(11), hyperisampsin G(12), spathulenol(13), quercetin(14), β-sitosterol(15), and β-amyrin(16).
Benzophenones ; Hypericum ; Quercetin

Benzophenones are aromatic ketone derivatives of dibenzoylmethane, exhibiting absorption characteristics not only in the UVC and UVB spectral ranges but also in part of the UVA range, up to 360nm. They are commonly used for extending the spectrum of photoprotection. Benzophenone-3, one of the most popular benzophenones, is the most common cause of sunscreen allergy as well as a substitute of PABA. We report a case of photoallergic contact dermatitis due to benzophenone-3 of sunscreen.
4-Aminobenzoic Acid ; Absorption ; Benzophenones ; Dermatitis, Photoallergic* ; Hypersensitivity

Dalbergiae Odoriferae Lignum is derived from heartwood of Dalbergia odorifera,which is national Ⅱ level of rare and endangered protective plants in China. Its resources are scarce and its price is high. In order to find substitutes of D. odorifera,the chemical constituents of 70% ethanol extract of heartwood of D. catifolia were systematically studied by using silica gel,Sephadex LH-20 column chromatography,and semi-preparative HPLC. Sixteen neoflavanoids were isolated and identified as eight dalbergiphenols( 1-8),three dalbergiones( 9-11),two dalbergins( 12,13),two benzophenones( 14,15) and one other type neoflavanoids( 16) based on spectroscopic data analyses and/or comparing the spectroscopic data with those in literature. Among them,compounds 3,7 and 11 were isolated from the genus Dalbergia for the first time,and compounds 2,4-6,8,14 and 15 were isolated from the D. latifolia for the first time. Ten neoflavonoids were both discovered from D. latifolia and D. odorifera.
Benzophenones ; China ; Chromatography, High Pressure Liquid ; Dalbergia ; Plant Extracts

Polyetheretherketone (PEEK) has been widely applied in orthopedics because of its excellent mechanical properties, radiolucency, and biocompatibility. However, the bioinertness and poor osteointegration of PEEK have greatly limited its further application. Growing evidence proves that physical factors of implants, including their architecture, surface morphology, stiffness, and mechanical stimulation, matter as much as the composition of their surface chemistry. This review focuses on the multiple strategies for the physical modification of PEEK implants through adjusting their architecture, surface morphology, and stiffness. Many research findings show that transforming the architecture and incorporating reinforcing fillers into PEEK can affect both its mechanical strength and cellular responses. Modified PEEK surfaces at the macro scale and micro/nano scale have positive effects on cell-substrate interactions. More investigations are necessary to reach consensus on the optimal design of PEEK implants and to explore the efficiency of various functional implant surfaces. Soft-tissue integration has been ignored, though evidence shows that physical modifications also improve the adhesion of soft tissue. In the future, ideal PEEK implants should have a desirable topological structure with better surface hydrophilicity and optimum surface chemistry.
Benzophenones ; Ketones/chemistry* ; Polyethylene Glycols/chemistry* ; Polymers/chemistry* ; Surface Properties

AIMTo study the benzophenones in the roots of Securidaca inappendiculata Hassk.

METHODSColumn chromatography (including silica gel and Sephadex LH-20) was used to isolate benzophenones whose structures were elucidated by HREI-MS, NMR (1D and 2D) methods.

RESULTSA new benzophenone was isolated and identified as 2-methoxy-3,4-methylenedioxy-benzophenone (I), along with a known compound 4-hydroxy-2,6-dimethoxy-benzophenone (II).

CONCLUSIONCompound I is a new one named as securiphenone B, compound II was isolated from the genus for the first time.

Benzophenones ; chemistry ; isolation & purification ; Molecular Conformation ; Molecular Structure ; Plant Roots ; chemistry ; Plants, Medicinal ; chemistry ; Securidaca ; chemistry

OBJECTIVE: To explore a novel method for fabricating removable partial dentures (RPDs) using polyetheretherketone (PEEK) by computer-aided design and computer-aided manufacturing (CAD/CAM) technologies and to evaluate their fits for different assemblies in vitro. METHODS: A standard stone cast of mandibular partial edentulous jaw was scanned using a lab scanner. Based on the digital cast, thirteen complete RPDs were designed combing dental CAD software and reverse engineering software, and then fabricated using PEEK by milling machine. Fits of assemblies were evaluated quantitatively by measuring the spaces between RPDs and casts. The gaps between RPDs and stone casts in different assemblies were duplicated using light-body silicone impression material and then measured using three-dimensional (3D) digital analysis methods in virtue of a dedicated software. Statistically, one-way analysis of variance (ANOVA) was used to compare the difference of gaps among assemblies in different shapes such as occlusal rest, denture base, and major connector. Paired-samples t test was used to compare the gaps difference for the similar shape assemblies in different areas. RESULTS: One-piece PEEK RPDs were successfully designed and fabricated by CAD/CAM, and all the RPDs were well-seated on stone casts. The gaps between occlusal rests and casts [(84.3±23.6) μm] were significantly larger than those of denture bases [(32.5±27.8) μm] and major connectors [(49.9±47.0) μm], which meant that the fits of denture bases and major connectors were better than that of occlusal rests. However, the fits of all assemblies could be accepted clinically. For the similar shape assemblies in different areas, there were no significantly differences for gaps between distal extension denture bases [(25.1±55.3) μm] and non-extensive denture bases [(41.5±17.7) μm]. The gaps of occlusal rests adjacent and nonadjacent to the edentulous space were (86.1±29.8) μm and (80.8±42.1) μm respectively and there were no significantly difference between them either. These results implied that different locations had no apparent effect on the fits of assemblies. CONCLUSION With the computer-aided design and computer-aided manufacturing technology, PEEK can be used to fabricate one-piece removable partial dentures. And all assemblies of the one-piece PEEK RPDs showed satisfying fits in vitro, indicating a promising clinical application in the future.
Benzophenones ; Computer-Aided Design ; Denture, Partial, Removable ; Ketones ; Polyethylene Glycols ; Polymers

OBJECTIVE: To develop dexamethasone plus minocycline-loaded liposomes (Dex/Mino liposomes) and apply them to improve bioinert polyetheretherketone (PEEK) surface, which could prevent post-operative bacterial contamination, enhance ossification for physiologic osseointegration, and finally reduce implant failure rates. METHODS: Dex/Mino liposomes were covalently grafted onto the PEEK surface using polydopamine (pDA) coating as a medium. Confocal laser scanning microscopy was used to confirm the binding of fluorescently labeled liposomes onto the PEEK substrate, and a microplate reader was used to semiquantitatively measure the average fluorescence intensity of fluorescently labeled liposome-decorated PEEK surfaces. Moreover, the mouse subcutaneous infection model and the beagle femur implantation model were respectively conducted to verify the bioactivity of Dex/Mino liposome-modified PEEK in vivo, by means of micro computed tomography (micro-CT) and hematoxylin and eosin (HE) staining analysis. RESULTS: The qualitative and quantitative results of fluorescently labeled liposomes showed that, the red fluorescence intensity of the PEEK-pDA-lipo group was stronger than that of the PEEK-NF-lipo group (P < 0.05); the liposomes were successfully and uniformly decorated on the PEEK surfaces due to the pDA coating. After mouse subcutaneous implantation of PEEKs for 24 hours, HE staining results showed that the number of inflammatory cells in the PEEK-Dex/Mino lipo group were lower than that in the inert PEEK group (P < 0.05), indicating a lower degree of infection in the test group. These results suggested that the Mino released from the liposome-functionalized surface provided an effective bacteriostasis in vivo. After beagle femoral implantation of PEEK for 8 weeks, micro-CT results showed that the PEEK-Dex/Mino lipo group newly formed more continuous bone when compared with the inert PEEK group; HE staining results showed that more new bones were formed in the PEEK-Dex/Mino lipo group than in the inert PEEK group, which were firmly bonded to the functionalized PEEK surface and extended along the PEEK interface. These results suggested that the Dex released from the liposome-functionalized surface induced effective bone regeneration in vivo. CONCLUSION Dex/Mino liposome modification enhanced the bioactivity of inert PEEK, the functionalized PEEK with enhanced antibacterial and osseointegrative capacity has great potential as an orthopedic/dental implant material for clinical application.
Animals ; Benzophenones ; Dogs ; Ketones ; Liposomes ; Mice ; Osseointegration ; Polyethylene Glycols ; Polymers ; Surface Properties ; X-Ray Microtomography

OBJECTIVE: Screen seventeen benzodizepines and their metabolitesin urine by GC/ECD and GC/MS. METHODS: They were GC (GC/ECD, GC/MS) assay of benzodizepines and GC (GC/ECD, GC/MS) assay of benzophenones of acid-hydrolytic products of 1,4-benzodizepines. RESULTS: The methods were simple and sensitive. The recoverys were 60% to 90% of most benzodizepines, linear calibration curves were 20 ng/ml-200 ng/ml (r > 0.99), and detection limits were 0.5 ng/ml-10 ng/ml. CONCLUSION They methods were evaluated with human urine samples.
Anti-Anxiety Agents/urine* ; Benzodiazepines/urine* ; Benzophenones/urine* ; Chromatography, Gas ; Gas Chromatography-Mass Spectrometry ; Humans

Ketoprofen, a propionic acid derivative is a non-steroidal anti-inflammatory drug with analgesic activity and it is used in the symptomatic treatment of rheumatoid arthritis and osteoarthritis. When exposed to sunlight, ketoprofen is broken down into various benzophenones. 3-ethyl-benzophenone as the major photoproduct is responsible for the photoallergic reaction to ketoprofen. A 30-year-old male presented with well-demarcated erythematous patches with itching sensation on both his ankle areas. He had applied Ketotop(R) plasters on both his ankle areas for arthralgia, and then the Ketotop(R) plaster-detached areas were exposed to sunlight. Patch test and photopatch test with?as is?showed positive reaction in photopatch test and the ingredients of Ketotop(R) plaster revealed positive reaction to the ketoprofen contained in Ketotop(R) plaster in photopatch test.
Adult ; Ankle ; Arthralgia ; Arthritis, Rheumatoid ; Benzophenones ; Dermatitis, Photoallergic* ; Diethylpropion ; Humans ; Ketoprofen* ; Male ; Osteoarthritis ; Patch Tests ; Pruritus ; Sensation ; Sunlight

OBJECTIVES: Maintaining the constant exposure to hydrophobic organic compouds in acute toxicity tests is one of the most difficult issues in the evaluation of their toxicity and corresponding risks. Passive dosing is an emerging tool to keep constant aqueous concentration because of the overwhelming mass loaded in the dosing phase. The primary objectives of this study were to develop the constant exposure condition for an acute mortality test and to compare the performance of the passive dosing method with the conventional spiking with co-solvent. METHODS: A custom cut polydimethylsiloxane (PDMS) tubing loaded with benzyl butyl phthalate (BBP) was placed in each well of a 24-well plate containing assay medium. The rate of the release of BBP from PDMS was evaluated by measuring the change in the concentration of BBP in the assay medium. The efficiency of maintaining constant exposure condition was also evaluated using a simple two-compartment mass transport model employing a film-diffusion theory. An acute mortality test using 10 C. elegans in each well was conducted for the evaluation of the validity of passive dosing and the comparative evaluation of the passive dosing method and the conventional spiking method. RESULTS: Free concentration in the assay medium reached 95% steady state value within 2.2 hours without test organisms, indicating that this passive dosing method is useful for an acute toxicity test in 24 hours. The measured concentration after the mortality test agreed well with the estimated values from partitioning between PDMS and the assay medium. However, the difference between the nominal and the free concentration became larger as the spiked concentration approached water solubility, indicating the instability of the conventional spiking with a co-solvent. CONCLUSIONS: The results in this study support that passive dosing provides a stable exposure condition for an acute toxicity test. Thus, it is likely that more reliable toxicity assessment can be made for hydrophobic chemicals using passive dosing.
Benzophenones ; Biological Availability ; Boronic Acids ; Caenorhabditis ; Caenorhabditis elegans ; Dibutyl Phthalate ; Dimethylpolysiloxanes ; Phthalic Acids ; Solubility ; Toxicity Tests, Acute