a 1-(9Z-octadecenoyl)-2-acyl-sn-glycero-3-phosphocholine + H2O => 1-(9Z-octadecenoyl)-sn-glycero-3-phosphocholine + a fatty acid + H(+)
a 1-(9z-octadecenoyl)-2-acyl-sn-glycero-3-phosphocholine + h2o => 1-(9z-octadecenoyl)-sn-glycero-3-phosphocholine + a fatty acid + h(+)