A dolabellane diterpene from the Brazilian brown alga Dictyota pfaffii

摘要

In order to continue our chemosystematic and ecological studies of the genus Dictyota Lamouroux, Dictyotales, Phaeophyta (Teixeira et al., 2001, and references cited therein), we examined Dictyota pfaffii Schnetter collected during June 2000 at Atol das Rocas reef, Rio Grande do Norte State (latitude 03 deg 51 min 03 sec S, longitude 33 deg 40 min 29 sec W), Brazil. Atol das Rocas reef is a marine biological reserve in the northeast Brazil, and is the only atoll in the South Atlantic. The present study is the first reference for D. pfaffii from the Brazilian coast. Voucher specimens (HRJ 9117) are deposited in the Herbarium Bradeanum of the Universidade do Estado do Rio de Janeiro.