preferred_name: trichloroethene + chloride + A + H(+) = tetrachloroethene + AH2
preferred_name_lc: trichloroethene + chloride + a + h(+) = tetrachloroethene + ah2
label: trichloroethene + chloride + A + H(+) = tetrachloroethene + AH2
label_lc: trichloroethene + chloride + a + h(+) = tetrachloroethene + ah2