1.1.99.6 | hanging-drop vapour-diffusion method with polyethylene glycol 8000 as the precipitant. The crystals belong to the monoclinic space group P2(1), with unit-cell parameters a = 63.4, b = 119.4, c = 70.2 A, beta = 112.0°, and diffract to 2.0 A resolution |