2,3,5,6,7,8-hexahydro-1H-azonino[5,4-b]indol-4-one

3-benzyl-1,2,5,6,7,8-hexahydroazonino[5,4-b]indol-4-one

2-chloro-1-(2,4,5,6,7,8-hexahydro-1H-azonino[5,4-b]indol-3-yl)butan-1-one

1-diazonio-6-methoxy-6-oxohex-1-en-2-olate

1-O-ethyl 7-O-methyl 3-oxoheptanedioate