Ingenol

Chemical Name: (1aR,2S,5R,5aR,6S,8aS,9R,10aR)-5,5a,6-trihydroxy-4-(hydroxymethyl)-1,1,7,9-tetramethyl-1a,2,5,5a,6,9,10,10a-octahydro-1H-2,8a-methanocyclopenta[a]cyclopropa[e][10]annulen-11-one

Smile: O[C@@]([C@@H](C(CO)=C[C@@]1([H])[C@H](C2(C)C)[C@H]2C3)O)([C@H]4O)[C@]([C@@H]3C)(C=C4C)C1=O