四种新的二萜糖苷,即virescenOSides R(1),S(2),T(3)和U(4),已从与整株猪戊草假单胞菌相关的海生顶头孢霉(Acremonium striatisporum)KMM 4401分离得到。根据HRFABMS,1D和2D NMR(1H,13C,
DEPT,COSY-45,COSY-RCT,HSQC,HMBC和NOESY光谱)以及酸性
水解的结果19-O- [β-
D-吡喃葡萄糖基(1-> 6)-β-d-
吡喃二糖基]-异哌丸-7,15-二烯-2α,3β
-二醇(1),19-O-β-D-
吡喃二糖基-3 -oxo-isopimara-8(14),15-diene-7alpha-ol(2),19-O-β-D-altropyranOSyl-3,7-dioxo-isopimara-8,15-diene(3)和19 -O-beta-D-altropyranOSyl-3,7-dioxo-iso