Deuterium labelled analog of α-Pinene, is found in the oils of many species of many coniferous trees, notably the pine. At low exposure levels, α-Pinene is a bronchodilator in humans, and is highly bioavailable with 60% human pulmonary uptake with rapid metabolism or redistribution. α-Pinene is an anti-inflammatory via PGE1, and seems to be a broad-spectrum antibiotic.