1,2-Hydrazinedicarboxylic acid der. 69857-73-4 AIDS-030237 AIDS030237 Diethyl 7-[cyclohexyl(morpholin-4-yl)methylene]-4,10-dioxo-3,11-dioxa-5,6,8,9-tetraazatridecane-6,8-dicarboxylate NSC318534