The molecule is an ionic phospholipid obtained by deprotonation of the free carboxy group of 2-O-glutaroyl-1-O-palmitoyl-sn-glycero-3-phosphocholine; major species at pH 7.3. It is a conjugate base of a 2-O-glutaroyl-1-O-palmitoyl-sn-glycero-3-phosphocholine.
5-[(2R)-1-hexadecanoyloxy-3-[oxido-[2-(trimethylazaniumyl)ethoxy]phosphoryl]oxypropan-2-yl]oxy-5-oxopentanoate