InChI=1/C23H20O10/c1-10(24)30-9-18-20(28)22(29)23(33-18)8-13-17(32-23)7-15(27)19-14(26)6-16(31-21(13)19)11-2-4-12(25)5-3-11/h2-7,18,20,22,25,27-29H,8-9H2,1H3/t18-,20-,22+,23+/m1/s Pinnatifinoside B [(2R,3S,4S,5R)-3,4,5'-trihydroxy-2'-(4-hydroxyphenyl)-4'-oxo-4,5-dihydro-3H,4'H,9'H-spiro[furan-2,8'-furo[2,3-h]chromen]-5-yl]methyl rel-acetate spiro[furan-2(3H),8'(9'H)-[4H]furo[2,3-h][1]benzopyran]-4'-one, 5-[(acetyloxy)methyl]-4,5-dihydro-3,4,5'-trihydroxy-2'-(4-hydroxyphenyl)-, (2R,3S,4S,5R)-