rac-1,4,4a,8aα-tetrahydro-6,7-dimethoxy-4aα-methyl-1α,4α-methanonaphthalin-5,8-dion

trimethyl((2E,6E,10E,14E)-3,7,11,15,19-pentamethylicosa-2,6,10,14,18-pentaen-1-yl)stannane