阿摩線上測驗
28. Bextra, a COX-2 inhibitor used in the treatment of arthritis, contains a heterocyclic ring. What is this heterocyclic ring
named? 
(A) furan ring
(B) oxazole ring
(C) isoxazole ring
(D) thiophene ring
(E) indole ring
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統計： A(4), B(10), C(14), D(1), E(0) #1037014
統計： A(4), B(10), C(14), D(1), E(0) #1037014
