1 S2A (1r,3a'S,10'S,10a'R)-7-methoxy-2-oxo-10',10a'-dihydro-2h,3a'H-spiro[naphthalene-1,3'-pentaleno[1,2-B]naphthalen]-10'-yl 2,6-dideoxy-2-(methylamino)-alpha-D-galactopyranoside 1.000 2 NCS Spiro[[7-methoxy-5-methyl-1,2-dihydro-naphthalene]-3,1'-[5-hydroxy-9-[2-methylamino-2,6-dideoxygalactopyranosyl-oxy]-5-(2-oxo-[1,3]dioxolan-4-yl)-3a,5,9,9a-tetrahydro-3h-1-oxa-cyclopenta[a]-S-indacen-2-one]] 0.760