label: 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane => 1,1-dichloro-2,2-bis(4-chlorophenyl)ethylene + chloride + H(+)
label_lc: 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane => 1,1-dichloro-2,2-bis(4-chlorophenyl)ethylene + chloride + h(+)