Objective To investigate the non-alkaloid constituent of Hippeastrun vittatum (Amaryllidaceae). Methods Solvent extraction and column chromatography were used to isolate the non-alkaloid constituents, and physicochemical constants and spectroscopic analysis were employed for structural elucidation. Results Five glycosphingosilipids were isolated, and their structures were elucidated to be (2S,3R, 4E, 8Z)-2-[(2R-2-hydroxyhexadecanoyl) amido ]-4, 8-octadecadiene-1, 3-diol 1-O-β-D-glucopyranoside ( Ⅰ ), (2S, 3R, 4E, 8E)-2-[(2R-2-hydroxyhexadecanoyl) amido]-4, 8-octadecadiene-1, 3-diol 1O-β-D-glucopyranoside ( Ⅱ ), (2S, 3R, 4E, 8Z)-2-[(2R-2-hydroxyoctadecanoyl) amido]-4, 8-octadecadiene-1, 3-diol 1-O-β-D-glucopyranoside (Ⅲ), (2S, 3R, 4E, 8E)-2-[(2R-2-hydroxyoctadecanoyl)amido]4, 8-octadecadiene-1, 3-diol 1-O-β-D-glucopyranoside ( Ⅳ ), (2S, 3R, 4E, 8Z)-2-[(2R-2-hydroxyeicosadecanoyl) amido]-4, 8-octadecadiene-1, 3-diol 1-O-β-D-glucopyranoside (Ⅴ), respectively. Conclusion They are all isolated from the fresh bulbs of H. vittatum for the first time.

Objective To evaluate the efficiency and safety of transurethral plasmakinetic enucleation of prostate(PKEP) in the treatment of patients with benign prostate hyperplasia(BPH) after transrectal prostate biopsy(TRPB).Methods A total of 88 BPH patients who underwent PKEP in our hospital during Jan.2012 to May 2015 were retrospectively analyzed and followedup.38 patients underwent TRPB before PKEP were defined as TRPB group,and 50 patients underwent PKEP with no TRPB were defined as control group.The baseline data,perioperative data and postoperative follow-up outcomes were recorded and compared between the two groups.Results The mean age of the 88 patients were 69.7 years.Compared with control group,TRPB group showed that age was younger(t=2.62,P＜ 0.05)and prostate specific antigen(PSA) level was higher(t=13.64,P＜0.01).Operation duration was longer in TRPB group than in control group (93.6 ± 31.0) min vs.(77.9 ± 17.3) min (t =2.6 4,P ＜ 0.05).There were no significant differences in the preoperative data,blood loss,continuous bladder irrigation duration after operation and period of catheterization between two groups (all P ＞ 0.05).Trans-operative time was significantly shortened when the time interval between TRPB and PKEP is more than 4 weeks(P＜ 0.01),while blood loss was similar in the two groups(P＞ 0.0 5).There were no adverse events of blood transfusion,transurethral resection syndrome and injury of bladder or rectal in both two groups.There were no significant differences in maximum flow rate(Qmax),international prostate symptom score(IPSS) or quality of life(QOL) scores between the two groups at 3,6 and 12 months of follow up(all P＞ 0.05).Conclusions PKEP after TRPB is a safe and effective treatment for BPH patient.When the time interval between TRPB and PKEP is more than 4 weeks,the performing of PKEP operation would reduce the difficulty of operative procedure and increase the safety.