1,2-dibutyryl-sn-glycero-3-phospho-(1D-myo-inositol) + phosphate => 1,2-dibutyryl-sn-glycero-3-phospho-(1D-myo-inositol-5-phosphate) + H2O
1,2-dibutyryl-sn-glycero-3-phospho-(1d-myo-inositol) + phosphate => 1,2-dibutyryl-sn-glycero-3-phospho-(1d-myo-inositol-5-phosphate) + h2o