On Monday the NAC confirmed the two substances that Jon Jones tested positive for during an out-of-competition test that he was given on June 16th.
Jones tested positive for hydroxy-clomiphene, “an anti-estrogenic agent” and “letrozole metabolite,” an “aromatase inhibitor,” for the tests he took for his fight scheduled at UFC 200 against Daniel Cormier, a fight he was eventually pulled from due to the positive test result.
A temporary suspension was put on the fight license of Jones, with a hearing scheduled later this year to determine the severity of his punishment.