Synonyms: A(1)-Norlanosta-8,23,25-trien-28-oicacid, 23,26-epoxy-22-oxo-, (4a)-; Dicyclopenta[a,f]naphthalene-1-carboxylic acid,1,2,3,3a,4,5,5a,6,7,8,8a,9,10,10a-tetradecahydro-1,3a,5a,8a-tetramethyl-6-[1-methyl-2-(4-methyl-2-furanyl)-2-oxoethyl]-,[1R-[1a,3ab,5ab,6b(S*),8aa,10aa]]-; Natalic acid