The C. reticulata oleoresin used in the bioassays was
obtained in February 2004 from copaiba trees within the
city limits of Bele´m, Para´ (Fig. 1D and E). The trunk of
each tree was perforated approximately 70 cm from the
base (Silva et al., 2003). Oleoresin was collected and
stored in amber-tinted glass flasks, placed in a
desiccator containing anhydrous silica gel blue.