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Conformation of marchantin H triacetate (1), a bis(diarylether)-type macrocyclic bis(bibenzyl), was studied by molecular mechanics calculations. The most stable enantiomeric conformations were found, but no direct path for the interconversion could be detected. Fast non-direct interconversion, however, was confirmed by chiral HPLC. Ring inversion of compounds containing the biphenyl moiety was investigated...
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