目的研究一株地衣内生真菌Sporormiellairregularis(No.71-11-4-1)的次生代谢产物。方法采用硅胶柱色谱、SephadexLfH-20凝胶柱色谱、ODS柱色谱以及HPLC等多种色谱手段对其发酵提取物进行分离纯化,并借助光谱学数据对单体化合物进行结构鉴定。结果分离得到9个甾类化合物,分别鉴定为22E-3,7-epoxy-5,10:8,9-disecoergosta-9(10),22-diene-5,8-dione(1)、22E-5α,6α-epoxyergosta-8(14),22-diene-3B,7α-diol(2)、22E-5α,6α-epoxyergosta-8(9),22-diene-3B,7α-diol(3)、22E-7α-methoxy-5α,6α-epoxyergosta-8(14),22-dien-3β-ol(4)、22E-3β-hydroxy-5α,6α-epoxyevgosta-22-en-7-one(5)、22E-ergosta-7,22-diene-3β,5α,6β-(6)、22E-6β-menthoxyergosta-7,22-diene-3β,5α-diol(7)、22E-5α,8α-epidioxyergosta-6,22-dien-3β-ol(8)、22E-ergosta-4,6,8(14),22-tetraen-3-one(9)。结论其中化合物1是新化合物,属于5,10:8,9二裂甾体;化合物2-9均为首次从Sporormiella属真菌中分离得到。
Objective To study the secondary metabolites of an endolichenic fungal strain Sporormiella irreg- ularis(No. 71-11-4-1 ). Methods The compounds were isolated by various chromatographic techniques and determined by spectroscopic methods. Results Nine steroids were obtained and identified as 22E-3,7-epoxy-5,10:8,9-disecoergosta-9(10),22-diene-5,8-dione(1)、22E-5α,6α-epoxyergosta-8(14),22-diene-3B,7α-diol(2)、22E-5α,6α-epoxyergosta-8(9),22-diene-3B,7α-diol(3)、22E-7α-methoxy-5α,6α-epoxyergosta-8(14),22-dien-3β-ol(4)、22E-3β-hydroxy-5α,6α-epoxyevgosta-22-en-7-one(5)、22E-ergosta-7,22-diene-3β,5α,6β-(6)、22E-6β-menthoxyergosta-7,22-diene-3β,5α-diol(7)、22E-5α,8α-epidioxyergosta-6,22-dien-3β-ol(8)、22E-ergosta-4,6,8(14),22-tetraen-3-one(9). Conclusions Compound 1 is a new 5,10: 8,9-disecosteroid. Compounds 2-9 are isolated from Sporormiella fungi for the first time.