8-(morpholine-4-sulfonyl)-furo[3,4-c]quinoline-1,3-dione

[5-(morpholine-4-sulfonyl)-2-oxo-1,2-dihydro-3H-indol-3-ylidene]malononitrile

[2-(2-Acetoxy-ethyl)-8-(morpholine-4-sulfonyl)-1,3-dioxo-2,3-dihydro-1H-pyrrolo[3,4-c]quinolin-4-ylsulfanyl]-acetic acid methyl ester