英文同义词: | tetrahydrodifuro[3,4-b:3',4'-d]furantetrone;3a,4a,7a,7b-Tetrahydrodifuro[3,4-b:3',4'-d]furan-1,3,5,7-tetrone;Difuro[3,4-b:3',4'-d]furan-1,3,5,7-tetrone,tetrahydro-;TETRACARBOXYLIC DIANHYDRIDE;Difuro[3,4-b:3,4-d]furan-1,3,5,7(3aH,4aH,7aH,7bH)-tetraone |