Resumo: Dois novos diterpenos do tipo labdano denominados 16-hidroxilarixol (1) e 16-hidroxi-7-labden-6-ona (2) foram isolados de Conchocarpus cyrtanthus, juntamente com mais três cumarinas: seselina (3), xantoxiletina (4), luvangetina (5); o alcaloide dictamina (6); seis esteroides: -sitosterol (7), estigmasterol (8), campesterol (9), 7-hidroxi--sitosterol (10), 7-hidroxiestigmasterol (11) e 7-hidroxicampesterol (12); três diterpenos: manool (13), 16-hidroximanoiloxido (14) e 16-hidroxi-13-epi-manoiloxido (15) AbstractTwo new labdane-type diterpenes called 16-hydroxylarixol (1) and 16-hydroxy-7-labden-6-one (2) were isolated from Conchocarpus cyrtanthus, along with three coumarins, seselin (3), xantoxiletin (4), luvangetin (5); the alkaloid dictamin (6); six steroids, -sitosterol (7), stigmasterol (8), campesterol (9), 7-hydroxy--sitosterol (10), 7-hydroxy-stigmasterol (11) and 7-hydroxy-campesterol (12); three diterpenes, manool (13), 16-hydroxymanoiloxide (14), and 16-hydroxy-13-epi-manoyloxide (15) and the lignan siringaresinol (16). These compounds were characterized based on analysis of data provided by one-and two-dimensional Nuclear Magnetic Resonance (NMR of 1 H and 13 C), High-resolution Mass Spectrometry, besides comparison with data reported in the literature.
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