In both 9,10-dimethoxy-11-oxatricyclo[6.2.1.0 (2,7)]undeca-4,9-diene-3,6-diol, C12H16O5, (I), and 5,6-dimethoxy-3,7-dioxatetracyclo[6.4.0.0(2,6).0(4,12)]dodec-9-en-11-ol, C12H16O5, (II), the hetero-oxygen-containing five-membered rings have an envelope conformation. The six-membered rings are in a boat conformation in compound (I), and in (II), one is in a half boat and the other is in a slightly distorted boat conformation. The molecules in both compounds interact through classical hydrogen bonds and C-H . . . O contacts.
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Tianjin Med Univ, Pharmaceutial Coll, Tianjin 300070, Peoples R China
Logist Univ PAP, Dept Pharmaceut Chem, Tianjin 300309, Peoples R ChinaTianjin Med Univ, Pharmaceutial Coll, Tianjin 300070, Peoples R China
Liu, Wenxiang
Wu, Yuqiang
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Tianjin Med Univ, Pharmaceutial Coll, Tianjin 300070, Peoples R China
Logist Univ PAP, Dept Pharmaceut Chem, Tianjin 300309, Peoples R ChinaTianjin Med Univ, Pharmaceutial Coll, Tianjin 300070, Peoples R China
Wu, Yuqiang
Li, Lingzhi
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Logist Univ PAP, Dept Pharmaceut Chem, Tianjin 300309, Peoples R China
Tianjin Key Lab Prevent & Control Occupat & Envir, Tianjin 300309, Peoples R ChinaTianjin Med Univ, Pharmaceutial Coll, Tianjin 300070, Peoples R China
Li, Lingzhi
Li, Xia
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Logist Univ PAP, Dept Pharmaceut Chem, Tianjin 300309, Peoples R China
Tianjin Key Lab Prevent & Control Occupat & Envir, Tianjin 300309, Peoples R ChinaTianjin Med Univ, Pharmaceutial Coll, Tianjin 300070, Peoples R China