(1S-(1alpha,4aalpha,6alpha,7alpha,7aalpha))-1-(beta-D-Glucopyranosyloxy)-1,4a,5,6,7,7a-hexahydro-6-hydroxy-7-methylcyclopenta(c)pyran-4-carboxylic acid 22255-40-9 EINECS 244-875-9 Loganic acid