1-naphthalenecarboxylic acid, 5-[2-(3-furanyl)ethyl]decahydro-1,4a-dimethyl-6-methylene-, methyl ester, (1S,4aR,5S,8aR)- InChI=1/C21H30O3/c1-15-6-9-18-20(2,11-5-12-21(18,3)19(22)23-4)17(15)8-7-16-10-13-24-14-16/h10,13-14,17-18H,1,5-9,11-12H2,2-4H3/t17-,18+,20+,21-/m0/s rel-(5R,6R,10S)-16-methoxy-16-oxo-19,20-didehydro-5,6,7,8,10,11,12-octahydro-20:5,10-dicycloretinal