4-methoxy-β-carboline

2-formyl-4-oxo-1,2,3,4-tetrahydro-β-carboline

2-hydroxy-4-methoxypyrido[3,4-b]indole

ethyl N-<(indol-2-yl)methyl>-N-formylaminoacetate

9-diethoxyphosphoryl-1-cyano-4-methoxy-β-carboline