1-methyl-2,5-dioxo-6-methylen-piperazine-3-spiro-3'-(N-methylindol-3-yl)-2'-oxirane

3-formyl-1-methylindole-2-carbonitrile

1-(benzyloxy)-2,5-dioxo-3-methylene-4-methyl-6-[(N-methylindol-3-yl)methyl]piperazine

1-methyl-3-methoxy-3-[(N-methylindol-3-yl)methyl]-6-methylenepiperazine-2,5-dione

1-methyl-3-hydroxy-3-[(N-methylindol-3-yl)methyl]-6-methylenepiperazine-2,5-dione