1,6-Hexanedione, 2,5-bis(1-piperidinylmethyl)-1,6-bis(4-propoxyphenyl)-, dihydrochloride 136767-12-9 2,5-Bis(1-piperidinylmethyl)-1,6-bis(4-propoxyphenyl)-1,6-hexanedione dihydrochloride