(3R,4S)-3-{5-[(E)-2-carboxyvinyl]-2-hydroxy-3-methoxyphenyl}-6-methoxy-3,4-dihydro-2H-chromen-4-yl rel-sulfate 2-propenoato, 3-[3-[(3S,4R)-3,4-dihydro-6-methoxy-4-(sulfooxy)-2H-1-benzopyran-3-yl]-4-hydroxy-5-methoxyphenyl]-, ion(1-), (2E)- InChI=1/C20H20O10S/c1-27-12-4-5-16-14(9-12)20(30-31(24,25)26)15(10-29-16)13-7-11(3-6-18(21)22)8-17(28-2)19(13)23/h3-9,15,20,23H,10H2,1-2H3,(H,21,22)(H,24,25,26)/p-1/b6-3+/t15-,20+/m1/s Torvanol A