81729-15-9

5-ethenyl-4a-hydroxy-1b-methyl-1b,3a,4,4a,5,8c,9,9a-octahydro-1aH,2H,7H-4,8b-(epoxymethano)oxireno[4,5][2]benzofuro[7,1-fg]isochromene-2,7-dione