A 4-deoxy-3 '' - demethoxy-3 '' - methylene desmycosin.

摘要

DESMICOSIN ANTIMICROBIAL of formula (1). Wherein R1 is hydrogen, ACYL O CARBONYL SUBSTITUTED; R2 is, formula (2); R3 is hydrogen or hydroxyl protecting group; And R4 is hydrogen, hydroxyl or hydroxyl PROTECTED; And pharmacologically acceptable salts THEREOF.