rivaroxaban

Etymology
From. The prefix is probably from, conjugation of.

Noun

 * 1)  An anticoagulant drug C19H18ClN3O5S (trademark Xarelto) that inhibits the activity of factor X and is taken orally especially to prevent and treat deep vein thrombosis and pulmonary embolism and to reduce the risk of stroke related to atrial fibrillation.