Crystal structure of (E)-2-(((1H-pyrrol-2-yl)methylene)amino)-3′,6′-dihydroxyspiro[isoindoline-1,9′-xanthen]-3-one — methanol (1/2), C27H25N3O6

C27H25N3O6, triclinic, P1‾$‾{1}$ (no. 2), a = 10.591(5) Å, b = 10.833(5) Å, c = 12.503(6) Å, α = 73.690(7)°, β = 88.569(7)°, γ = 60.856(6)°, V = 1191.7(9) Å3, Z = 2, Rgt(F) = 0.0542, wRref(F2) = 0.1716, T = 296 K.