has functional parent N-(heptadecanoyl)hexadecasphingosine-1-phosphocholine (2S,3R,4E)-2-(heptadecanoylamino)-3-hydroxyhexadec-4-en-1-yl 2-(trimethylazaniumyl)ethyl phosphate 688.552 689.003 A sphingomyelin 33:1 obtained by formal condensation of the carboxy group of heptadecanoic acid with the amino group of hexadecasphingosine-1-phosphocholine. C(CCCCCCCC)CC\C=C\[C@@H](O)[C@@H](NC(CCCCCCCCCCCCCCCC)=O)COP(OCC[N+](C)(C)C)(=O)[O-] C38H77N2O6P CGMZWBZSOINWHL-YPDYIYJKSA-N CHEBI:136272 InChI=1S/C38H77N2O6P/c1-6-8-10-12-14-16-18-19-20-22-24-26-28-30-32-38(42)39-36(35-46-47(43,44)45-34-33-40(3,4)5)37(41)31-29-27-25-23-21-17-15-13-11-9-7-2/h29,31,36-37,41H,6-28,30,32-35H2,1-5H3,(H-,39,42,43,44)/b31-29+/t36-,37+/m0/s1 LIPID_MAPS_instance:LMSP03010037 N-(heptadecanoyl)hexadecasphing-4-enine-1-phosphocholine SM(d16:1/17:0) chebi_ontology sphingomyelin d16:1/17:0 heptadecanoic acid sphingomyelin 33:1