The molecule is a naphthochromene that is hexadecahydro-2H-naphtho[2,1-f]chromen-2-one which is substituted at position 3 by a hydroxymethylene group, at position 8 by a hydroxy group, and at positions 10a and 12a by methyl groups. It is a delta-lactone, a secondary alcohol, a naphthochromene and an oxo seco-steroid.
(3Z,4aS,4bR,6aS,8S,10aS,10bS,12aS)-8-hydroxy-3-(hydroxymethylidene)-10a,12a-dimethyl-4a,4b,5,6,6a,7,8,9,10,10b,11,12-dodecahydro-4H-naphtho[2,1-f]chromen-2-one