N2-acetyl-9-(2,3,5-tri-O-acetyl-α-D-arabinofuranosyl)-O6-diphenylcarbamoylguanine

9-(2',3'-di-O-acetyl-α-D-arabinofuranosyl)-N2-isobutanoylguanine

N,N-二苯基-氨基甲酸 2-(乙酰氨基)-9H-嘌呤-6-基酯

N,9-二乙酰鸟嘌呤

鸟嘌呤