4-.alpha.-Phorbol 12,13-diacetate 4.a.-Phorbol 12,13-diacetate 56144-62-8 5H-Cyclopropa[3,4]benz[1,2-e]azulen-5-one, 9,9a-bis(acetyloxy)-1,1a,1b,4,4a,7a,7b,8,9,9a-decahydro-4a,7b-dihydroxy-3-(hydroxymethyl)-1,1,6,8-tetramethyl-, [1aR-(1aa,1bb,4aa,7aa,7ba,8a,9b,9aa)]- AIDS-001986 AIDS001986