英语语法分析

The invention relates to a method for preparing adefovir dipivoxil dual oxygen methyl pivalate from adefovir.

本发明涉及从阿德福韦制备阿德福韦酯二氧新戊酸双氧甲基酯的方法。

The excretion of methyl mercury becomes very difficult because of high enterohepatic circulation and reabsorption by proximal convoluted tubule.

由于甲基汞在体内的肠肝循环和肾脏近曲小管对甲基汞的重吸收效率高，使甲基汞的体外排泄十分困难。

Tribenuron-methyl is synthesized via ring-opening reaction, phosgenation and condensation.

经过开环、光气化、缩合等一系列反应制备了苯磺隆。