14. Which one of the following descriptions is WRONG?
(A) Caffeine is a trimethylxanthine.
(B) Theophylline is a dimethylxanthine.
(C) Theobromine is the bypoxanthine derivative of cocoa.
(D) Theobromine and theophylline are similar but lack the methyl group at N-1 and at N-7, respectively.
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