2,2-dimethyl-propionic acid 1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-purin-7-ylmethyl ester

1-甲基黄嘌呤

1-methyl-7-[(pivaloyloxy)methyl]xanthine

三甲基氯硅烷

茶碱