3128-15-2
环戊-1-烯-1,2-二羧酸
→
91846-80-9
1,4-二氯-6,7-二氢-5H-环戊并[d]吡嗪
92224-44-7
2,3,6,7-四氢-5H-环戊并[d]吡嗪-1,4-二酮
6250-96-0
6,7-dihydro-5H-cyclopenta[d]pyridazine