10-Deacetyl baccatin III dimethyl sulfoxide disolvate

The title compound, C29H36O10.2C2H6OS, forms a monoclinic crystal containing two hydrogen-bonded dimethyl sulfoxide molecules per 10-deacetyl baccatin III. The lattice is further stabilized by two additional hydrogen bonds and a dipole-dipole interaction. A comparison of 10-deacetyl baccatin III with the structurally similar docetaxel reveals differences primarily in the benzoyl moiety, while comparisons to baccatin III identify relative differences principally in the cyclooctane- and cyclohexane-ring conformations.