Synonyms: 12,20-Dideoxyphorbol-13-isobutyrate;57379-43-8;Propanoic acid, 2-methyl-, 1,1a,1b,4,4a,5,7a,7b,8,9-decahydro-4a,7b-dihydroxy-1,1,3,6,8-pentamethyl-5-oxo-9aH-cyclopropa(3,4)benz(1,2-e)azulen-9a-yl ester, (1aR-(1aalpha,1bbeta,4abeta,7aalpha,7balpha,8alpha,9aalpha))-