2H-1-benzopyran-5-propanoic acid, 2-ethenyloctahydro-7-hydroxy-6-(1-hydroxy-1-methylethyl)-2,5,8a-trimethyl-, methyl ester, (2R,4aS,5S,6R,7R,8aS)- 3-[7-Hydroxy-6-(1-hydroxy-1-methyl-ethyl)-2,5,8a-trimethyl-2-vinyl-octahydro-chromen-5-yl]-propionic acid methyl ester Agallochin M InChI=1/C21H36O5/c1-8-19(4)11-9-15-20(5,12-10-16(23)25-7)17(18(2,3)24)14(22)13-21(15,6)26-19/h8,14-15,17,22,24H,1,9-13H2,2-7H3/t14-,15+,17-,19+,20+,21+/m1/s Methyl ent-13-epi-8,13-epoxy-4,6alpha-dihydroxy-3,4-secolabd-14-en-3-oate methyl rel-3-[(2R,4aS,5S,6R,7R,8aS)-7-hydroxy-6-(1-hydroxy-1-methylethyl)-2,5,8a-trimethyl-2-vinyloctahydro-2H-chromen-5-yl]propanoate