81203-56-7 Cyclopenta(c)pyran-4-carboxylic acid, 1-(beta-D-glucopyranosyloxy)-1,4a,5,6,7,7a-hexahydro-5-hydroxy-7-methyl-, methyl ester, (1S-(1alpha,4aalpha,5alpha,7beta,7aalpha))- Penstemonoside