(2Z)-2,3-dichlorobut-2-enedioic acid 2-butenedioic acid, 2,3-dichloro-, (2Z)- InChI=1/C4H2Cl2O4/c5-1(3(7)8)2(6)4(9)10/h(H,7,8)(H,9,10)/b2-1