1H,3H-Pyrano[3,4-c]pyran-5-carboxylic acid, 4,4a,8,8a-tetrahydro-8-hydroxy-1-methyl-3-oxo-, methyl ester, [1S-(1.alpha.,4a.beta.,8.beta., 8a.beta.)]- 74848-77-4 Kingiside aglucon NSC611346