.beta.-D-Glucopyranose, 6-deoxy-2-O-(6-deoxy-.beta.-D-glucopyranosyl)-, 3-acetate 1-[decahydro-5''-methyl-4''-[(1-oxo-3-phenyl-2-propenyl)oxy]dispiro[oxirane-2,3'(2'H)-benzofuran-2',2''-[2H]pyran]-6'-carboxylate] NSC342443 PHYLLANTHOSIDE, S3'-DESACETYL-