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Crystal structure of 9-deoxo-9-dihydro-9a-(n- propyl)-9a-aza-9a- homoerythronolide A

Source of material: crystals obtained from acetone and ethanol (1:1). The conformation of the aglycone ring of both independent molecules A and B is consistent with that established in the structures of N-methyl and N-ethyl derivatives. All hydroxyl-H atoms take part in the intermolecular H-bondings, thus forming helices around each screw diad axis. C24H47NO7, orthorhombic, P212121 (No. 19), a =21.792(5) À, b =18.364(3) Â, c =13.726(7) Â, V =5493.0 Â3, Z=8, R(F) =0.058, Rw(F2) = 0.139.

crystal structure, 15-membered macrolide antibiotic, azalide

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