Synonyms: 17,19-Dinor-5b-labda-7,13(16),14-triene-18,20-dioicacid, 2b,3b:15,16-diepoxy-1a,4,12-trihydroxy-5,9-dimethyl-, di-d-lactone (8CI);9,7-(Epoxymethano)-4H-oxireno[6,7]naphtho[2,1-c]pyran-4,11-dione,2-(3-furanyl)-1,2,6,6a,7,7a,8a,9,9a,9b-decahydro-7-hydroxy-6a,9b-dimethyl-,[2R-(2a,6aa,7a,7aa,8aa,9b,9aa,9bb)]-; Fibralactone (7CI); Fibraurin