MER-A2026 A SUBSTANCE AND B SUBSTANCE, PRODUCTION THEREOF AND VASODILATOR COMPRISING THE SAME SUBSTANCE AS ACTIVE INGREDIENT

摘要

NEW MATERIAL:A 4-pyridone derivative shown by formula I or II (R is methyl or isopropyl). USE:A treating agent, preventing agent and a vasodilator for diseases of circulatory organs. PREPARATION:A strain such as Streptomyces karnatakensis Me2,108 strain (FERM P-11,849) is cultured preferably by submerged culture at 28 deg.C for 2-10 days.