Abstract
The title compound, C35H34O6, crystallizes with two independent molecules per asymmetric unit. The molecules assume slightly different conformations. The crystallographically unique molecules stack in columns along the b axis. Close C—H⋯O contacts are observed between molecules related by a twofold screw axis. Such contacts are: C35—H35⋯O40 (related by 2 − x, {1\over 2} + y, −1 − z), C⋯O 3.440 (5) Å; H⋯O 2.553 (5) Å; C—H⋯O 153.7 (1)° for molecule 1 and: C33′-H33′⋯O40′ (related by 1 − x, −{1\over 2} + y, 1 − z); C⋯O 3.422 (5) Å, H⋯O 2.491 (5) Å, 163.3 (1)° for molecule 2. The absolute configuration was established by internal comparison to the (R)-(−)-O-methyl mandelic acid moiety.
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