110101-65-0 21-(4-(3,6-Bis(diethylamino)-2-pyridinyl)-1-piperazinyl)-16-methylpregna-1,4,9(11)triene-3,20-dione hcl 21-(4-(5,6-Bis(diethylamino)-2-pyridinyl)-1-piperazinyl)-16-methylpregna-1,4,9(11)triene-3,20-dione hcl Pregna-1,4,9(11)-triene-3,20-dione, 21-(4-(3,6-bis(diethylamino)-2-pyridinyl)-1-piperazinyl)-16-methyl-, hydrochloride, (16alpha)- U 74500A U-74500A U74500A