The molecule is an organic heterotetracyclic compound that is isopimarane in which a hydrogen at position 2 of the 13-ethyl substituent has been replaced by a (sulfooxy) group, a double bond has been introduced at the 7-8 position, and the beta-methyl group at position 4 has been oxidised to the corrsponding carboxy group and coupled to position 6 to give a gamma-lactone. Isolated from an avendophytic fungus, Xylaria sp. YM 311647, obtained from Azadirachta indica, it shows potent inhibitory activity against C. albicans and Pyricularia oryzae. It has a role as an antifungal agent and a fungal metabolite. It is a diterpene, a gamma-lactone, an organic sulfate, an organic heterotetracyclic compound and an isopimarane diterpenoid.
2-[(1R,2S,5S,9R,12S,16R)-1,5,12-trimethyl-11-oxo-10-oxatetracyclo[7.6.1.02,7.012,16]hexadec-7-en-5-yl]ethyl hydrogen sulfate