Acta Cryst. (2013). E69, o126
[ doi:10.1107/S1600536812050994 ]
Abstract: The title compound, C18H18O4, is a triclinic polymorph of the previously reported monoclinic polymorph [Han & Zhen (2005). Acta Cryst. E61, o4358-o4359]. In the crystal of the triclinic polymorph, molecules are linked by two pairs of C-HO hydrogen bonds, forming a two-dimensional network parallel to (102), and enclosing loops with graph set motifs of R22(8) and R22(6).
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