the is [0305] variables are chosen such that R1 is ???CH(OH)???(CH2)2???; and [0306] Q is a bond and R1 is [0307] wherein the variables are chosen such that R1 is ???CH(OH)???CH2???S(O)0-2???. [0308] A preferred compound of Formula (VIII) therefore, is one wherein G and G1 are as defined above and in which the remaining variables have the following definitions: [0309] Ar1 is phenyl or R10-substit