om, halogen atom other than fluorine atom, or alkyl group having 1-10 carbon atoms, provided that at least one of (3+2j) R10 groups and 2i R11 groups represents a fluorine atom or fluoroalkyl group having 1-10 carbon atoms, i is an integer of 0 to 10, and j is an integer of 1 to 18. [0196] wherein one of (12+6k)R10 groups represents a group ???[C(R11)2]i??? and the other R10 groups individually re