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