2-pentynoic acid, 5-[(1R,2S,4aS)-decahydro-2-[(methoxycarbonyl)oxy]-2,5,5,8a-tetramethyl-1-naphthalenyl]-, methyl ester InChI=1/C22H34O5/c1-20(2)13-9-14-21(3)16(20)12-15-22(4,27-19(24)26-6)17(21)10-7-8-11-18(23)25-5/h16-17H,7,9-10,12-15H2,1-6H3/t16-,17+,21?,22-/m0/s methyl rel-5-{(1R,2S,4aS)-2-[(methoxycarbonyl)oxy]-2,5,5,8a-tetramethyldecahydronaphthalen-1-yl}pent-2-ynoate