| 摘要 |
<p>Compounds represented by general formula (I) wherein R1 and R2 each represents hydrogen and R3 represents hydrogen, hydroxy, or amino, provided that R2 and R3 in combination may represent =O or =N-OR11, where R11 represents hydrogen or lower alkyl; R4 and R5 in combination represent =O; and Y represents -N(R6)(R7) or -N+(R8)(R9)(R10)X-, where R¿6? to R10 each represents hydrogen, lower alkyl, etc., and X?-¿ represents an anion.</p> |
