[7-(aziridin-1-yl)-5,8-dioxo-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl] acetate
acetic acid [7-(1-aziridinyl)-5,8-dioxo-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl] ester
acetic acid (7-ethylenimino-5,8-diketo-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl) ester
[7-(aziridin-1-yl)-5,8-dioxo-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl] ethanoate