87277-56-3
4,6,6-trimethyl-1,3-diphenylpyrano[2,3-c]pyrazole
+
762-21-0
丁炔二酸二乙酯
→
~73%
88584-45-6
diethyl 4-methyl-1,3-diphenylindazole-6,7-dicarboxylate