8-(2-Nitrophenyl)-1,3,5,7-tetrahydro-8H-difuro[3,4-b,3',4'-e]pyran-1,7-dion

3,3'-(2-Nitrobenzyliden)bistetronsaeure

2,2'-isopropylidenebis<3-hydroxyfuran-2(5H)-one>

甲醇

2-Cyano-quinoline-3-carboxylic acid ethyl ester