3,4,4a,10b-Tetrahydro-3,4,8,10-tetrahydroxy-2-(hydroxymethyl)-9-methoxypyrano(3,2-c)(2)benzopyran-6(H)-one 4-Methoxy-2-(tetrahydro-3,4,5-trihydroxy-6-(hydroxymethyl)pyran-2-yl)alpha-resorcylic acid gamma lactone 477-90-7 5956-63-8 Bergenin Bergenin [JAN]