| Literature DB >> 17873845 |
Abstract
The structure of a representative pyrazolo[3,4]pyran derivative was determined by 1D and 2D NMR techniques. Complete 1H and 13C chemical shifts for this compound are reported. Careful analysis of the HMBC (Heteronuclear Multi-Bond Correlation) spectrum helped to elucidate the configuration of the derivative around C7 and C8. The results showed that the characteristic double-strong and double-weak cross peak pattern in the HMBC spectrum for C7 and C8 might be useful for establishing the structures of other pyrazolo[3,4]pyran derivatives.Entities:
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Year: 2007 PMID： 17873845 PMCID： PMC6149502 DOI： 10.3390/12051117
Source DB: PubMed Journal: Molecules ISSN： 1420-3049 Impact factor: 4.411