Two new meroterpenoid hydroquinones,rel-(4bE,6Z,8E,9aS,10S)-1,4-dihydroxy-9a,10-dihydro-10,12-epoxy-5-methylbenzo[a]azulen-12-one andrel-(4bZ,6Z,8E,9aS,10S)-1-hydroxy-9a,10-dihydro-4,11:10,12-diepoxy-benzo[a]azulen-11,12-dione, along with the known peptide derivative (S)-N-benzoylphenylalanine-(S)-2-benzamide-3-phenylpropyl ester, were isolated from the roots of Cordia globosa. Their structures were determined by 1D and 2D nuclear magnetic resonance (NMR) spectrometry, Fourier transform infrared (FTIR) spectroscopy and high resolution atmospheric pressure chemical ionization mass spectrometry (HRAPCIMS) data analysis. The new compounds were tested against three human cancer cell lines (colon adenocarcinoma, ovarian carcinoma and glioblastoma), but none of them exhibited any activity.

Duas novas ceramidas N-(4-hidroxifeniletil)octacosamida (1) e rel-(2S,3S,4R,16E)-2-[(2'R)-2'-hidroxinonadecanoilamino]-heneicosadec-16-eno-1,3,4-triol (2) foram isoladas do extrato etanólico de Acnistus arborescens. As estruturas foram elucidadas por métodos espectroscópicos (experimentos de RMN 1D e 2D, EMAR com ionização por electrospray, EM e IV).

Two new ceramides, N-(4-hydroxyphenethyl)octacosamide (1) and rel-(2S,3S,4R,16E)-2-[(2'R)-2'-hydroxynonadecanoylamino]-heneicosadec-16-ene-1,3,4-triol (2) were isolated from the EtOH extract of Acnistus arborescens. The structures were elucidated by spectroscopic (1D and 2D NMR experiments, HR-ESI-MS, LR-MS and IR) methods.

Uma nova saponina triterpênica monodesmosídica, caracterizada como ácido 3beta-O-alfa-L-ramnopiranosil-(1->2)-beta-D-glicopiranosil pomólico, foi isolada de Cordia piauhiensis Fresen (Boraginaceae). Sua estrutura foi determinada através de extensiva análise de métodos de RMN, incluindo os experimentos ¹H, ¹H-COSY, HMQC, HMBC e NOESY. Os triterpenóides ácido quinóvico, ácido cinchólico, ácido 3beta-O-6-deoxi-beta-D-glicopiranosídeo cinchólico e 3beta-O-beta-D-glicopiranosídeo quinóvico foram também isolados.

A new monodesmoside triterpenoid saponin characterized as 3beta-O-alpha-L-rhamnopyranosyl-(1->2)-beta-D-glucopyranosyl pomolic acid, was isolated from Cordia piauhiensis Fresen (Boraginaceae). Its structure was determined by extensive NMR analysis, including ¹H, ¹H-COSY, HMQC, HMBC, and NOESY experiments. In addition, four known triterpenoids: quinovic acid, cincholic acid, cincholic 3beta-O-6-deoxy-beta-D-glucopyranoside acid and quinovic 3beta-O-beta-D-glucopyranoside acid were also isolated.