2-Propenoic acid, 2-methyl-, 5-ethoxy-1a,2,3,7,8,8a,9,10,11a,11b-decahydro-1a-methyl-9-methylene-10-oxo-5H-3,6-methenofuro(2,3-f)oxireno(d)oxacycloundecin-8-yl ester 96627-10-0 Nudaphantin