7-hydroxy-6-methyl-1H-pyrazolo[1,5-a]pyrimidin-5-one

5,7-dichloro-6-methylpyrazolo[1,5-a]pyrimidine

7-甲基吡唑并[1,5-a]嘧啶

5-methylpyrazolo[1,5-a]pyrimidine

N'-(1H-pyrazol-5-yl)ethanimidamide