Synonyms: 2H-Furo[2,3-f][2]benzopyran-2,8(3H)-dione,5a-ethyloctahydro-4-hydroxy-3,9-bis(methylene)-, [3aR-(3aa,4a,5aa,9aa,9bb)]-; 2H-Furo[2,3-f][2]benzopyran-2,8(3H)-dione, 5ab-ethyl-3ab,4,5,5a,6,9,9ab,9ba-octahydro-4b-hydroxy-3,9-dimethylene-, (+)- (8CI);1,2-Dihydrovernolepin; Vernolepin, 1,2-dihydro-