| abstract |
Compounds are provided which are represented by Formulas (I) or (II) wherein R is (III), (IV), (V), (VI), (VII), (VIII), (IX) or (X); wherein R9, R10, R11, R12, R13, and R14 are each, independently, hydrogen or a lower alkyl of 1-6 carbon atoms; R6, and R7 are each, independently, hydrogen, lower alkyl of 1-6 carbon atoms, or CH2COOR8, where R8 is a lower alkyl of 1-6 carbon atoms; and X is O or S; R1 is hydrogen or a lower alkyl of 1-6 carbon atoms; R2, R3, and R4 are each, independently, hydrogen or halogen; and R5 is a lower alkyl of 1-6 carbon atoms; or a pharmaceutically acceptable salt thereof. |