ethyl 2-(2-oxo-2,3-dihydro-1H-indol-3-ylidene)acetate

2-(2-oxo-1,2-dihydro-3H-indol-3(E)-ylidene)acetic acid ethyl ester

2-(2'methylphenyl)-quinoline-3,4-dicarboxylic anhydride

4-hydroxy-9-methoxycarbonylamino-1,2,3,4-tetrahydroacridine