3-methyl-1-(4-methylphenyl)chromeno[4,3-c]pyrazol-4-one

3-ethyl-4-oxochromen-2-olate

3-(2-bromoacetyl)-4-hydroxychromen-2-one

3-acetyl-4-azidochromen-2-one

3-methyl-2-phenylchromeno[4,3-c]pyrazol-4-one