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

Which of the following definitions best describes '4,4'-pentane-2,3-diylbis(2-fluorophenol)'?

A. A polyphenol that is 4,4'-(ethane-1,2-diyl)diphenol substituted by fluoro groups at positions 2 and 2', a methyl group at position 2 and an ethyl group at position 3.
B. It is a potent carbonic anhydrase inhibitor (Ki = 45.1 nM and 4.5 nM for CA IX and CA XII, respectively) that is in clinical trials for the treatment of hypoxic malignancies .
C. A proanthocyanidin consisting of (+)-gallocatechin and (+)-catechin units joined by a (4alpha->6)-linkage.
D. A member of the class of pyranoxanthones that is 2H,6H-pyrano[3,2-b]xanthen-6-one substituted by hydroxy, geminal methyl and a prenyl group at positions 5, 8, 2 and 12 respectively. It is isolated from the stem bark of Calophyllum brasiliense and exhibits significant inhibitory activity against 12-O-tetradecanoylphorbol-13-acetate induced Epstein-Barr virus early antigen activation in Raji cells.

Answer: A polyphenol that is 4,4'-(ethane-1,2-diyl)diphenol substituted by fluoro groups at positions 2 and 2', a methyl group at position 2 and an ethyl group at position 3.