7,11-Methanopyrano[4,3,2-kl][2,5,8]benzotrioxacyclotridecin-4-acetic acid, 2,3,3a,4,5,7,8,10,11,13-decahydro-3,15,16-trihydroxy-2,5,13-trioxo-10,17-bis[(3,4,5-trihydroxybenzoyl)oxy]-8-[[(3,4,5-trihydroxybenzoyl)oxy]methyl]-, (3S,3aS,4S,7R,8R,10S,11R,17S)-;Eutannin;[(4R,5S,7R,8R,11S,12S,13S,21S)-13,17,18-Trihydroxy-2,10,14-trioxo-5,21-bis[(3,4,5-trihydroxybenzoyl)oxy]-7-{[(3,4,5-trihydroxybenzoyl)oxy]methyl}-3,6,9,15-tetraoxatetracyclo[10.7.1.1.0]hen icosa-1(20),16,18-trien-11-yl]acetic acid
2-8℃