Synonyms: Propanoicacid, 2-methyl-,9-(benzoyloxy)-1,1a,1b,4,4a,5,7a,7b,8,9-decahydro-7b-hydroxy-1,1,3,6,8-pentamethyl-5-oxo-9aH-cyclopropa[3,4]benz[1,2-e]azulen-9a-ylester, [1aR-(1aa,1bb,4ab,7aa,7ba,8a,9b,9aa)]-; 9aH-Cyclopropa[3,4]benz[1,2-e]azulene,propanoic acid deriv.; Euphorbia factor Pr1