Carbamic acid, [5-amino-3-[[(4-chlorophenyl)methylamino]methyl]-1,2-dihydro-pyrido[3,4-b]pyrazin-7-yl]ethyl ester, compound with ethanol (2:1) Carbamic acid, [5-amino-3-[[(4-chlorophenyl)methylamino]methyl]pyrido[3,4-b]pyrazin-7-yl]-, ethyl ester, compd. with ethanol (2:1) NSC251711