[mycofactocin precursor peptide]-C-terminal glycyl-N-{5-[(4-hydroxyphenyl)methyl]-4,4-dimethyl-2-oxopyrrolidin-3-yl}acetamide + H2O = [mycofactocin precursor peptide]-C-terminal glycine + 3-amino-5-[(4-hydroxyphenyl)methyl]-4,4-dimethyl-2-pyrrolidin-2-one — reaction