Atomaric acid

(1S,4aβ)-2-Isopropylidene-5β-(2-hydroxy-3-methyl-5-methoxybenzyl)-5,6β,8aα-trimethyldecahydronaphthalene-1-propionic acid

(1S,4aβ)-Decahydro-5β-[(2-hydroxy-5-methoxy-3-methylphenyl)methyl]-5,6β,8aα-trimethyl-2-(1-methylethylidene)-1-naphthalenepropionic acid