Figure 1
ORTEPII (Johnson, 1976) drawing of (I) with the atomic numbering scheme. Displacement ellipsoids have been plotted at the 30% probability level and H atoms have been omitted for clarity. Atom C18′, representing the smaller fraction of the disordered methyl atom C18, has also been omitted [symmetry code: (i) 2 − x, −y, 1 − z]. |