- wherein x and R.sup.00 are, independently, as defined above, PA0 (b) R.sup.00 R.sup.00 CH(CH.sub.0).sub.y - wherein y is zero, one, two, three, four or five, R.sup.00 is as defined above, and R.sup.00 is lower alkyl, cycloalkyl, naphthyl, phenyl unsubstituted or substituted with from one through five substituents, preferably from one through three substituents, comprising alkyl, halo, trifluoromethyl, amino, N-lower monoalkyl amino, N,N-lower dialkylamino, lower thioalkyl, lower alkylsulfonyl, or nitro; PA0 (c) --COR.sup.0 wherein R.sup.0 is 