| 摘要 |
The present invention is directed to compounds represented by the following structural Formula (I),(a) R1 is selected from the group consisting of hydrogen, substituted or unsubstituted group selected from C1-C8 alkyl, aryl-C0-4-alkyl, heteroaryl-C0-4-alkyl, C3-C6 cycloalkylaryl-C0-2-alkyl, and –CH-C(O)-R17-R18, wherein R17 is O or NH and R18 is optionally substituted benzyl; (b) R2 is selected from the group consisting of C1-C6 alkyl, C1-C6 alkenyl, aryl-C0-4-alkyl, heteroaryl-C0-4-alkyl, C1-C4 alkyl sulfonamide, C1-C4 alkyl amide, OR10 and C3-C6 cycloalkyl; (c) W is O or S; (d) X is an optionally substituted C1-C5 alkylene linker wherein one carbon atom of the linker may optionally be replaced with O, NH, S, and optionally two carbons together may form a double bond; (e) Y is selected from the group consisting of C, O, S, NH and a single bond; and (f) E is selected from the group consisting of C(R3) (R4 )A, A, and a substituted or unsubstituted group selected from the group consisting of (CH)n COOR19. |
