問題詳情
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.
參考答案
答案：99
統計：A:0,B:1,C:1,D:0,E:0
難度：計算中