| 3-methyl-4-oxo-2-phenyl-4h-1-benzopyran-8-carboxylic aci 1-methyl-4-piperid |
| 1-methyl-4-piperidinyl 3-methyl-4-oxo-2-phenyl-4h-1-benzopyran-8-carboxylate |
| 1-methyl-4-piperidinyl 3-methylflavone-8-carboxylate |
| 3-methyl-4-oxo-2-phenyl-4h-1-benzopyran-8-carboxylic aci 1-methyl-4-piperidinyl ester |
