Appeal No. 1998-2588
Application No. 08/673,702
18. A compou
nd of the formula
wherein each of R and R is independently hydrogen, C -C -alkoxy, benzyloxy, C -C -a 1a 1 4 1 6
alkanoyloxy, benzoyloxy, substituted benzoyloxy bearing 1 to 3 substituents each of which
is independently halo, C -C -loweralkyl, or C -C -loweralkoxy, C alkoxycarbonyloxy, or1 4 1 4 1-5
C -C -alkylsulfonyloxy.
4 6
9
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