Benzoic acid 5-(1,3-dihydro-pyrrolo[3,4-b]quinoline-2-carbonyl)-3-ethyl-4-formyl-2-oxo-3,6-dihydro-2H-pyran-3-yl ester
2,3-dihydro-1H-pyrrolo[3,4-b]quinoline
Benzoic acid 1-benzyloxycarbonyl-1-(5-ethoxy-4-formyl-furan-3-yl)-propyl ester
Benzoic acid 1-carboxy-1-(5-ethoxy-4-hydroxymethyl-furan-3-yl)-propyl ester
Benzoic acid 3-ethoxy-7-ethyl-6-oxo-6,7-dihydro-4H-furo[3,4-c]pyran-7-yl ester