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

Which of the following classes is one valid superclass of '[(8S,9S,10R)-6-(4-oxanylmethyl)-9-[4-(3-pyridinyl)phenyl]-1,6-diazabicyclo[6.2.0]decan-10-yl]methanol'?

A. ( -)-1-hydroxybybetaochlamic acid
B. ( Z)-6-benzylidene-3-hydroxymethyl-1,4-dimethyl-3-methylsulfanylpiperazine-2,5-dione
C. phenylpyridine
D. ((18)O)water

Answer: phenylpyridine