Tetrahydrocyclobuta[1,2-C:3,4-C′]difuran-1,3,4,6-tetrone4415-87-6100 % similar 3A,4,4A,7A,8,8A-Hexahydro-4,8-etheno-1H,3H-benzo[1,2-C:4,5-C′]difuran-1,3,5,7-tetrone1719-83-161 % similar Tetrahydro-1H-cyclopenta[1,2-C:3,4-C′]difuran-1,3,4,6(3ah)-tetrone6053-68-558 % similar Norcantharidin29745-04-855 % similar Norcantharidin5442-12-655 % similar exo-5,6-Dehydronorcantharidin6118-51-055 % similar Carbic anhydride129-64-652 % similar Himic anhydride2746-19-252 % similar Nadic anhydride826-62-052 % similar 3-Oxabicyclo[3.2.0]heptane-2,4-dione4462-96-850 % similar Isobutyric anhydride97-72-350 % similar cis-1,2-Cyclohexanedicarboxylic anhydride13149-00-345 % similar Rel-(3ar,6as)-tetrahydro-1H-cyclopenta[C]furan-1,3(3ah)-dione35878-28-545 % similar Hexahydrophthalic anhydride85-42-745 % similar 6,6-Dimethyl-3-oxabicyclo[3.1.0]hexane-2,4-dione67911-21-143 % similar 1,2,3,6-Tetrahydrophthalic anhydride85-43-843 % similar Tetrahydrophthalic anhydride935-79-543 % similar Lactic anhydride97-73-443 % similar (+)-Diacetyl-L-tartaric anhydride6283-74-539 % similar 3-Methyltetrahydrophthalic anhydride5333-84-638 % similar