2-amino-4-butoxy-6-2'-tetrahydropyran-2''-yloxy-1'-oxopropylpteridine

2-amino-4-butoxy-6-2'-hydroxy-1'-oxopropylpteridine

6-羟基-2,4,5-三氨基嘧啶

ethyl 2-bromo-3,3-diethoxypropionate

2-amino-3-cyano-5-(furan-2-yl)pyrazine 1-oxide