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

Which of the following classes is one valid superclass of '2-methoxy-N-[(5R,6R,9S)-5-methoxy-3,6,8,9-tetramethyl-2-oxo-11-oxa-3,8-diazabicyclo[10.4.0]hexadeca-1(12),13,15-trien-14-yl]acetamide'?

A. ((13)C)carbon dioxide
B. lactam
C. ((2-bromo-4-methylphenyl){6-[(4-{[(2R)-3-(dimethylamino)-2-hydroxypropyl]oxy}phenyl)amino]pyrimidin-4-yl}amino)acetonitrile
D. ((2-bromo-4-methylphenyl){6-[(4-{[(2S)-3-(dimethylamino)-2-hydroxypropyl]oxy}phenyl)amino]pyrimidin-4-yl}amino)acetonitrile

Answer: lactam