120642-74-2
3-methyl-7-aminoxanthine
→
120642-78-6
1-Benzyl-3-methyl-7-aminoxanthine
1076-22-8
3,7-二氢-3-甲基-1H-嘌呤-2,6-二酮
120642-81-1
1-benzyl-3-methyl-7H-purine-2,6-dione