<jats:p>5,6,7,7a-Tetrahydro-3<jats:italic>H</jats:italic>-pyrrolizin-7a-ol-3-one (<jats:italic>VI</jats:italic>) and <jats:italic>N</jats:italic>-[2-(1-hydroxy-4-methylpentyl)]acetamide (<jats:italic>VII</jats:italic>) were isolated from submerged cultures of the macrotetrolide-producing strains <jats:italic>Streptomyces globisporus</jats:italic> and <jats:italic>S. griseus</jats:italic>. Proposed structures are based on spectroscopic measurements.