Ingenol mebutate (substance)
2-Butenoic acid, 2-methyl-, (1aR,2S,5R,5aS,6S,8aS,9R,10aR)-1a,2,5,5a,6,9,10,10a- octahydro-5,5a-dihydroxy-4-(hydroxymethyl)-1,1,7,9-tetramethyl-11-oxo-1H-2,8a- methanocyclopenta[a]cyclopropa[e]cyclodecen-6-yl ester, (2Z)-