Synonyms: 2-(Hydroxymethyl)propenoic acid (3aR,9R)-3,3aβ,4,5,6,6aβ,7,8,9aβ,9bα-decahydro-8α-hydroxy-3,6-bis(methylene)-2-oxospiro[azuleno[4,5-b]furan-9(2H),2'-oxirane]-4β-yl ester;3-Hydroxy-2-methylenepropionic acid [(3aR,6aβ,9R,9aβ,9bα)-decahydro-8α-hydroxy-3,6-bis(methylene)-2-oxospiro[azuleno[4,5-b]furan-9(2H),2'-oxiran]]-4β-yl ester;Janerin;JANERIN(SH)