1,6-Bis(4-ethoxyphenyl)-2,5-bis(1-piperidinylmethyl)-1,6-hexanedione dihydrochloride 1,6-Hexanedione, 1,6-bis(4-ethoxyphenyl)-2,5-bis(1-piperidinylmethyl)-, dihydrochloride 136767-11-8