label: a 4-O-methyl-alpha-D-glucuronosyl ester derivative + H2O = 4-O-methyl-alpha-D-glucuronate derivative + an alcohol + H(+)
label_lc: a 4-o-methyl-alpha-d-glucuronosyl ester derivative + h2o = 4-o-methyl-alpha-d-glucuronate derivative + an alcohol + h(+)