141340-72-9
N-benzyloxymethyl-7,9-dioxo-8-azatricyclo(4.3.3.0)dodec-3-ene
→
62291-38-7
5,6-dihydro-4H-cyclopenta[c]pyrrole-1,3-dione
13861-05-7
7,9-Dioxo-8-aza(4.3.3)propellen-3