Synonyms: Simplexin,30-butyl-; 6H-2,8b-Epoxyoxireno[6,7]azuleno[5,4-e]-1,3-benzodioxol-6-one,3a,3b,3c,4a,5,5a,8a,9,10,10a-decahydro-5,5a-dihydroxy-4a-(hydroxymethyl)-7,9-dimethyl-10a-(1-methylethenyl)-2-tridecyl-,[2S-(2a,3ab,3bb,3cb,4ab,5b,5ab,8aa,8ba,9a,10ab)]-; Pimelea factor P4