1 ECP (2e)-3-methyl-5-[(1r,4ar,8ar)-5,5,8a-trimethyl-2-methylidenedecahydronaphthalen-1-yl]pent-2-en-1-yl trihydrogen diphosphate 1.000 2 9AX (2e)-3-methyl-5-[(1r,2s,8as)-1,2,5,5-tetramethyl-1,2,3,5,6,7,8,8a-octahydronaphthalen-1-yl]pent-2-en-1-yl trihydrogen diphosphate 0.933