rac-Ibuprofen-13C3 is isotope labelled form of rac Ibuprofen (I140000) which is a selective cyclooxygenase inhibitor (IC50=14.9uM) that inhibits PGH synthase-1 and PGH synthase-2 with comparable potency. Ibuprofen has has been shown to reduce Ebola infection in rodents (4).