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Four new diterpene glycosides, virescenosides R1 (1), R2 (2), R3 (3) and Z (4) were isolated from a marine strain of Acremonium striatisporum KMM 4401 associated with the holothurian Eupentacta fraudatrix. Structures of 1–3 were determined as the corresponding biosides having isopimaradiene-type aglycons with additional oxidation and unsaturation patterns. Virescenosides Z (4) was structurally identified...
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