| 摘要 |
PCT No. PCT/EP97/00628 Sec. 371 Date Jun. 29, 1998 Sec. 102(e) Date Jun. 29, 1998 PCT Filed Feb. 12, 1997 PCT Pub. No. WO97/30078 PCT Pub. Date Aug. 21, 1997Mono- or di-substituted derivatives of GE2270 factors C2a, D2 and E of general formula (I), wherein W represents a moiety of formula (a), (b) or (c), R1 and R2 representing a variety of substituents, X1 is methyl, X2 is a -CH2-W1 moiety and X3 is methylamino or amino, or X1 is a -CH2-W1 moiety, X2 is methoxymethylene and X3 is methylamino, with the proviso that when X3 is amino, then W must be 2-(aminocarbonyl)-pyrrolidinyl; with the further proviso that when W is 2-(aminocarbonyl)-pyrrolidinyl, then W1 cannot be hydroxy; and the pharmaceutically acceptable salts thereof. The mono- or di-substituted derivatives of antibiotic GE 2270 of formula (I) are antimicrobial agents mainly active against gram positive bacteria.
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