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RING-CONTRACTED N-DEMETHYL-N-ISOPROPYL-SPIROACETYL DERIVATIVES OF ERYTHROMYCIN A (10,13,15-TRIOXATRICYCLO 9.2.1.1 9.6 -PENTADECANONE DERIVATIVES), METHOD OF PREPARATION AND PHARMACEUTICAL COMPOSITIONS THEREOF
RING-CONTRACTED N-DEMETHYL-N-ISOPROPYL-SPIROACETYL DERIVATIVES OF ERYTHROMYCIN A (10,13,15-TRIOXATRICYCLO 9.2.1.1 9.6 -PENTADECANONE DERIVATIVES), METHOD OF PREPARATION AND PHARMACEUTICAL COMPOSITIONS THEREOF
Ä(1'R),2R,3S,4S,5R,6R,9R,11R,12R,14RÜ-11-(1'-hydroxypropyl)-2,4,6,8,11 ,14-hexamethyl-10,13,15-trioxatricycloÄ9.2.1.19.6Ü pentadecan-1-one derivatives of formula (I) and their salts are new: R1 = H or Me.
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