92139 ⎘
Esters of carboxylic acids; Esters of carbonic or haloformic acids; Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen; Formic acid esters of trihydroxylic compounds
Process for preparing entecavir and its intermediates
Aldehyde conversion method using a molecular sieve and the use of the molecular sieve as a catalyst in said method