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In the title compound, C27H22O2, the acetyl group is nearly coplanar with the the ring to which it attacted [O—C—C—C torsion angle = −5.5 (3)°]. The three phenyl groups of the tri­phenyl­methyl substituent are mutually nearly perpendicular, making dihedral angles of 89.87 (11) and 78.29 (11) and 60.34 (11)°. Two intra­molecular C—H... O hydrogen bonds occur. In the crystal, C—H... O hydrogen bonds link the moleclues into chains along the b-axis direction.
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