844644-05-9
2-methyl-6-oxo-1,4,5,6-tetrahydro-cyclopenta[b]pyrrole-3-carboxylic acid ethyl ester
→
~93%
844644-07-1
2-methyl-6-oxo-4,5-dihydro-1H-cyclopenta[b]pyrrole-3-carboxylic acid