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(a) ORTEP view of the TPH·TMSA asymmetric unit (displacement ellipsoids plotted at the 50% probability level; disordered fragments in TPH molecule are omitted for clarity). (b) Helix arrangement around the screw axis 21 parallel to the [010] direction, in a view along the [405] direction. (c) 3D structure composed of interconnected helical systems via C–H···O and π···π interactions, in a view along the [010] direction.
