Heteronuclear multibond correlation

COCON ° and a web-based version (WebCocon 4J) search for compounds of known molecular formula compatible with 2-D NMR data as input. This code also can interpret heteronuclear multibond correlations as 2-, 3-, and 4-bond connectivities. [Pg.268]

Carbon peak assignments were not available in the earlier reports, and hence, a comprehensive study utilizing H, correlation spectroscopy (COSY), heteronuclear correlation (HETCOR), and heteronuclear multibond correlation (HMBC) nuclear magnetic resonance was undertaken. NMR CDCI3 (5 ppm vs. TMS (multiplicity H s coupling constant assignment)) 7.36 (d IH J5.4 Hz, H-2),... [Pg.424]

The structures of 30 - 50 were all elucidated from 2D-NMR spectroscopic data despite the relatively few proton resonances in the H NMR spectra of some of these compounds leading ultimately to a paucity of heteronuclear multibond coherence (HMBC) correlations. The cohort of twenty pyrroliminoquinone metabolites isolated from the four species of Southern African latrunculid sponges provided a unique opportunity for a comparative analysis of their cytotoxicity against human colon... [Pg.74]

HMBC Heteronuclear multiple-bond correlation spectroscopy To elucidate structure of organic molecules To establish long-range (i.e., multibond) heteronuclear coupling... [Pg.308]

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