1,2-diacyl-sn-glycero-3-phosphocholine phosphatidylcholine 34:2 1-palmitoyl-2-octadecadienoyl-sn-glycero-3-phosphocholine 757.562 757.5622 A 1,2-diacyl-sn-glycero-3-phosphocholine in which the 1-acyl group is specified as palmitoyl while the acyl group (R) at position 2 is octadecadienoyl with the two double bonds at unspecified positions. C42H80NO8P CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC([*])=O CHEBI:84785 PC(16:0/18:2) chebi_ontology