. . . "ydrocarbyloxy group having from 1 to about 12 carbon atoms, a nitro group, a nitrile group, a halogen, such as chlorine or bromine or fluorine, or a --CO--R1 group; or a compound represented by the following Formula XXXXI ##STR25## wherein each Y2, Y5 and R1 are as hereinbefore defined." . . .