24928-15-2 4-.beta.-Phorbol 12,13-diacetate 4.b.-Phorbol 12,13-diacetate 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,1bS,4aR,7aS,7bS,8R,9R,9aS)- AIDS-001979 AIDS001979 Phorbol 12,13-diacetate