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

Which of the following definitions best describes '(1S,2R,4R)-cinflubrolin'?

A. The (1R,2S,4S)-isomer of cinflubrolin.
B. A 3-oxo-fatty acyl-CoA(4-) arising from deprotonation of the phosphate and diphosphate functions of (8Z,11Z,14Z,17Z)-3-oxoicosa-8,11,14,17-tetraenoyl-CoA.
C. The (1S,2R,4R)-isomer of cinflubrolin.
D. A triterpenoid saponin isolated from the stem bark of Albizia chinensis that exhibits cytotoxic activity against a small panel of human tumour cell lines.

Answer: The (1S,2R,4R)-isomer of cinflubrolin.