15215-11-9 1H,3H-Pyrano(3,4-c)pyran-1-one, 4,4a-beta,5,6-tetrahydro-6-alpha-hydroxy-5-alpha-vinyl- 1H,3H-Pyrano(3,4-c)pyran-1-one, 5-ethenyl-4,4a,5,6-tetrahydro-6-hydroxy-, (4aalpha,5beta,6alpha)- 5-Ethenyl-4,4a,5,6-tetrahydro-6-hydroxy-1H,3H-pyrano(3,4-c)pyran-1-one (4aalpha,5beta,6alpha)- 6-alpha-Hydroxy-5-alpha-vinyl-4,4a-beta,5,6-tetrahydro-1H,3H-pyrano(3,4-c)pyran-1-one Sweroside aglycone