Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'cholesteryl (9Z)-heptadecenoate'?

A. An O-acyl-L-carnitine that is L-carnitine having a 3-methylglutaryl group as the acyl substituent
B. A monounsaturated fatty acyl-CoA(4-) arising from deprotonation of the phosphate and diphosphate functions of trans-2-pentadecenoyl-CoA; major species at pH 7.3.
C. The (1R,2R)-stereoisomer of isocitric acid.
D. A cholesterol ester obtained by the formal condensation of cholesterol with cis-9-heptadecenoic acid.

Answer: A cholesterol ester obtained by the formal condensation of cholesterol with cis-9-heptadecenoic acid.