Estudo fotoquímico das folhas e galhos de Litsea glutinosa (Lour.) C. B. Rob. forneceu um novo diglucosídeo megastimano (6S, 7E, 9R)-6, 9-dihidroxi-4, 7-megastigmadieno-3-ona-9-O-[α-L-arabinofuranosil-(l→6)]-β-d-glucopiranosídeo (1), juntamente com os glicosídeos (6S, 7E, 9R)-roseosido (2), (7'R, 8'R)-3, 5'-dimetoxi-9, 9'-dihidroxi-4, 7'-epóxi lignina 4'-β-D-glucopiranosídeo (3), álcool (7'R, 8'S)-dihidrodehidrodiconifenil 9'-O-β-D-xilopiranosídeo (4) e pinoresinol 3-O-β-D-glucopiranosídeo (5). Suas estruturas foram estabelecidas com base em métodos espectroscópicos e químicos. Compostos 2-5 são reportados pela primeira vez nestas espécies. Composto 1 foi avaliado para atividades citotóxicas de linhagens de células tumorais humanas (células leucemia mielóide HL-60, carcinoma hepatocelular SMMC-7721, câncer de pulmãoA-549, câncer da mama MCF-7 e câncer do colo SW480), para as quais provou-se ser inativo (IC50 > 40 µM).
Phytochemical study on the leaves and twigs of afforded the new megastigmane diglycoside (6S, 7E, 9R)-6, 9-dihydroxy-4, 7-megastigmadien-3-one-9-O-[α-L-arabinofuranosyl-(l→6)]-β-D-glucopyranoside (1), along with glycosides (6S, 7E, 9R)-roseoside (2), (7'R, 8'R)- 3, 5'-dimethoxy-9, 9'-dihydroxy-4, 7'-epoxylignan 4'-β-D-glucopyranoside (3), (7'R, 8'S)-dihydrodehydrodiconifenyl alcohol 9'-O-β-D-xylopyranoside (4) and pinoresinol 3-O-β-D-glucopyranoside (5). Their structures were established on the basis of extensive spectroscopic and chemical methods. Compounds 2-5 were reported for the first time in this species. Compound 1 was evaluated for cytotoxic activities against human tumor cell lines (myeloid leukemia HL-60, hepatocellular carcinoma SMMC-7721, lung cancer A-549, breast cancer MCF-7 and colon cancer SW480 cells), for which it was proved to be inactive (IC50 > 40 µM).