Sesquiterpenes, a natural compound found in essential oils of Vetiver, Patchouli, Cedarwood, Sandalwood and Frankincense, can increase levels of oxygen in the brain by up to 28 percent

I've seen this in numerous natural, health and alternative places but not a single one points directly to the research article.  Can't find it in Google scholar.

Vienna and Berlin Universities, researchers discovered that sesquiterpenes, a natural compound found in essential oils of Vetiver, Patchouli, Cedarwood, Sandalwood and Frankincense, can increase levels of oxygen in the brain by up to 28 percent (Nasel, 1992).

This would seem to be extremely important post-stroke if this is true, much faster and better than HBOT. Tell your doctor to find and evaluate this immediately. Before your next stroke.