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 Bicyclo(2.2.2)oct-5-ene-2,3-dicarboxylic Anhydride6708-37-852 % similar Nadic anhydride826-62-052 % similar 3-Oxabicyclo[3.2.0]hept-6-ene-2,4-dione10374-07-950 % similar Difluoroacetic anhydride401-67-250 % similar 3-Oxabicyclo[3.2.0]heptane-2,4-dione4462-96-850 % similar 3-Oxabicyclo(3.1.0)hexane-2,4-dione5617-74-350 % similar Isobutyric anhydride97-72-350 % similar cis-1,2-Cyclohexanedicarboxylic anhydride13149-00-345 % similar (-)-trans-1,2-Cyclohexanedicarboxylic anhydride31982-85-145 % similar Rel-(3aR,6aS)-Tetrahydro-1H-cyclopenta[c]furan-1,3(3aH)-dione35878-28-545 % similar trans-Cyclohexane-1,2-dicarboxylic anhydride71749-03-645 % similar Hexahydrophthalic anhydride85-42-745 % similar