8-[(3-Hydroxypropyl)amino]-1,3-dioxolo[4,5-g]quinoline-7-carboxylic acid ethyl ester C??? ??, ??, ??

8-[(3-Hydroxypropyl)amino]-1,3-dioxolo[4,5-g]quinoline-7-carboxylic acid ethyl ester ?? ?? ? ???

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8-[(3-Hydroxypropyl)amino]-1,3-dioxolo[4,5-g]quinoline-7-carboxylic acid ethyl ester ?? ??