Crystal structure of (3S,3′S,4R,4′S)-3′-(furan-3-yl)-3-hydroxy-4′-methyl-3,5,6′,7′-tetrahydro-1H,3′H-4,5′-spirobi[isobenzofuran]-1,1′(4′H)-dione-methanol (1/1), C21H22O7

C21H22O7, orthorhombic, P212121 (no. 19), a = 8.3764(2) Å, b = 11.4813(2) Å, c = 19.2394(4) Å, V = 1850.29(7) Å3, Z = 4, Rgt(F) = 0.0303, wRref(F2) = 0.0767, T = 100(2) K.