Dioicine: A novel prenylated purine alkaloid from Gymnocladus dioicus

Heterocycles

Volumn 79, Issue C, 2009, Pages 583-598

  Fitch, Richard W ^a   Spande, Thomas F ^b   Garraffo, H Martin ^b   Chase, Rachael R ^a   Clinedinst, Mylaka A ^a   Parkes, Derek A ^a   Reed, Richard ^a   Whittaker, Noel F ^b   Daly, John W ^b  

^a INDIANA STATE UNIVERSITY   (United States)

^b NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES   (United States)

Author keywords

Caffeine; Coffeetree; Guanine; NMR Spectrometry; Xanthine

Indexed keywords

EID: 67749111660     PISSN: 03855414     EISSN: None     Source Type: Journal    
DOI: 10.3987/COM-08-S(D)19     Document Type: Article

References (51)

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34. While the Z-isomer was not isolated in pure form, it has an identical EI mass spectrum to dioicine. The isolated dioicine is determined to be the E-isomer based on the large (J = 14 Hz) coupling constant between the H1' and H2'.
35. Unfortunately, this tree was later damaged in a storm and removed from the site. The immature pods collected from this tree were collected several days after the tree was felled, precluding comparison with the leaves, which had already deteriorated. The degradation of the leaves allowed more sun exposure to the pods, which we believe contributed to the unexpectedly high Z/E ratio.
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