N(5),N(5),N(5)-trimethyl-N(2)-[(3R)-3-(acyloxy)acyl]-L-ornithine betaine *[C@H](CC(N[C@H](C([O-])=O)CCC[N+](C)(C)C)=O)OC(C*)=O 286.153 286.325 An amino-acid betaine obtained by deprotonation of the carboxy group of any N(5),N(5),N(5)-trimethyl-N(2)-[(3R)-3-(acyloxy)acyl]-L-ornithine; major species at pH 7.3. C13H22N2O5R2 CHEBI:138481 MetaCyc:NNN-Trimethyl-Ornithine-Lipid PMID:25925947 an N,N,N-trimethylornithine lipid chebi_ontology amino-acid betaine