New Sterol Derivatives from the Marine Sponge<i>Xestospongia</i>sp.
作者:Zhongbin Cheng、Dong Liu、Nicole J. de Voogd、Peter Proksch、Wenhan Lin
DOI:10.1002/hlca.201600021
日期:2016.8
Chemical examination of a marine sponge Xestospongia sp. resulted in the isolation of 20 sterol derivatives (1 – 20), including eight new sterols namely aragusterols J – L (1 – 3), (5α,7α,12β,22E)‐7,12,18‐trihydroxystigmast‐22‐en‐3‐one (4), (5α,7α,12β,24R)‐ and (5α,7α,12β,24S)‐7,12,20‐trihydroxystigmastan‐3‐one (5/6), and (5α,7α,12β,22E,24R)‐ and (5α,7α,12β,22E,24S)‐7,12,20‐trihydroxyergost‐22‐en‐3‐one
海洋海绵Xestospongia sp。的化学检查。导致20个甾醇衍生物(的隔离1 - 20),包括八个新固醇即aragusterols的J - L(1 - 3),(5 α,7 α,12 β,22 ë)-7,12,18-trihydroxystigmast -22烯-3-酮(4),(5 α,7 α,12 β,24 - [R )-和(5 α,7 α,12 β,24小号)-7,12,20-trihydroxystigmastan -3-酮(5 / 6),和(5α,7 α,12 β,22 ê,24 - [R )-和(5 α,7 α,12 β,22 ê,24小号)-7,12,20-trihydroxyergost-22烯-3-酮(7 / 8)。通过广泛的光谱分析和化学转化确定了新化合物的结构。固醇多样性的主要特征是在侧链上存在环丙烷单元,而在豆甾醇中首次发现具有18-羟甲基的化合物4。细胞毒性试验