(4Z,15Z)-bilirubin IXalpha C8,C12-beta-D-bisglucuronoside + H2O => (4Z,15Z)-bilirubin IXalpha C8-beta-D-glucuronoside + D-glucuronate + H(+)
(4z,15z)-bilirubin ixalpha c8,c12-beta-d-bisglucuronoside + h2o => (4z,15z)-bilirubin ixalpha c8-beta-d-glucuronoside + d-glucuronate + h(+)