1989
DOI: 10.1016/s0031-9422(00)98083-x
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A clerodane diterpene and other constituents of Croton megalocarpus

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Cited by 15 publications
(8 citation statements)
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“…Accurate mass measurement of the molecular ion of 2 indicated a molecular formula C 20 H 30 O 4 . The UV spectrum displayed absorption suggestive of a conjugated furan chromophore .…”
mentioning
confidence: 99%
“…Accurate mass measurement of the molecular ion of 2 indicated a molecular formula C 20 H 30 O 4 . The UV spectrum displayed absorption suggestive of a conjugated furan chromophore .…”
mentioning
confidence: 99%
“…C 20 H 28 O 5 . The UV spectrum of 1 displayed typical absorption maxima at 257 and 214 nm, associated with a furan chromophore [14] [15]. In the IR spectrum, a strong band at 3457 cm À1 indicated the presence of OH groups, a band at 1725 cm À1 was assigned to a d-lactone, and those at 3028, 1462 and 872 cm À1 were due to a furyl moiety [14] [16].…”
mentioning
confidence: 99%
“…Its formula was established by ESI-MS as C 20 H 26 O 6 . The UV spectrum of 2 showed characteristic absorption maxima at 255 and 215 nm due to a conjugated furan chromophore [14] [15]. The IR band at 3684 cm À1 was assigned to OH groups, that at 1770 cm À1 to a g-lactone, the one at 1660 cm À1 indicated an a,b-unsaturated C=O group, and those at 1596 and 873 cm À1 pointed to a furyl moiety [8] [17].…”
mentioning
confidence: 99%
“…Esse aspecto é particularmente importante em Croton, dada a reconhecida diversidade química de suas espécies , a complexidade e grandeza do gênero e a necessidade de provisão de sinapomorfias fenotípicas para sustentação de clados que se estão 83 estabelecendo com as filogenias moleculares que vêm sendo publicadas (RIINA et al, 2010;RIINA et al, 2009;BERRY et al, 2005). -MENSAH et al, 1989;MACIEL et al, 1998;PERES et al, 1998;HIRUMA-LIMA et al, 2002;BLOCK et al, 2004;, não foram detectados nas amostras analisadas. Uma vez que esse grupo de substâncias é relatado com freqüência em diversas espécies de Croton , é possível que a metodologia utilizada não seja adequada para detecção desses compostos.…”
Section: Salatino E Colaboradoresunclassified