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Cucurbitacins from Cayaponia racemosa: isolation and total assignment of 1H and 13C NMR spectra |
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| Authors: | Chaves Davina C Assunção João Carlos C Braz-Filho Raimundo Lemos Telma L G Monte Francisco J Q |
| Institution: | Departamento de Química Organica e Inorganica, Universidade Federal do Ceará, CEP: 60.45170 Fortaleza, Ceará, Brazil. |
| Abstract: | Two new cucurbitane-type triterpenoids, 2beta,3beta,16alpha,20(R),25-pentahydroxy-9-methyl-19-norlanost-5-en-7,22-dione and 2beta,3beta,16alpha,20(R),25-pentahydroxy-9-methyl-19-norlanost-5-en-7,11,22-trione, were isolated from fruits of Cayaponia racemosa. The total (1)H and (13)C chemical shift assignment of these two closely related compounds is described, making use of one- and two-dimensional NMR techniques. |
| Keywords: | NMR 1H NMR 13C NMR 2D NMR triterpenoids cucurbitacins cucurbitaceae Cayaponia racemosa |
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