Russian figure skater Kamila Valieva, who is at the center of an ongoing Olympic doping case, had three substances that can be used to treat heart conditions found in her testing sample, according to an exhibit filed Sunday in a hearing by the Court of Arbitration for Sport (CAS) cited by the New York Times.
Two of those substances, Hypoxen and L-carnitine, are not banned.
The exhibit is part of a court application allegedly filed by the World Anti-Doping Agency (WADA) in its case against the 15-year-old skater. The Dossier Center, an investigative website run by an exiled Russian businessman, published the WADA document online and it was reviewed for CNN by Travis Tygart, head of the United States Anti-Doping Agency (USADA). The Dossier Center did not publish the doping control form exhibited in the case, and CNN has not reviewed it.
USADA tried to ban Hypoxen in 2017 due to its performance-enhancing capabilities, but that ban was not implemented, according to documents provided to CNN by Tygart.
"It raises a whole host of questions that have yet to be determined and what appears to be the case of a pretty deliberate attempt to use substances in order to enhance performance," Tygart told CNN on Tuesday.
Tygart is not involved in the investigation but has reviewed the documents. He noted that Valieva declared on her doping control form the use of Hypoxen and L-carnitine.
Supradyn, which can be used as an immunity boosting supplement, was also listed on Valieva's doping control form, according to the document published by the Dossier Center.
The document also said Valieva tested at a "2.1 nanograms per milliliter level" for trimetazidine which Tygart described as "not a trace level."
"It's certainly consistent with an intentional use," he added.
"The picture it paints is, you've got a 15-year-old. Does she have the wherewithal and the knowledge and the financial resources to find two drugs ... to use to increase endurance reduce fatigue? It's clear there was an effort to use substances and drugs to increase performance," Tygart added.
"I don't think for a second this young athlete had the financial resources or knowledge to take these three substances to increase performance, or where to even get these three substances."
Valieva tested positive for the banned substance trimetazidine in December, which is commonly used to treat the heart condition angina.
"It's using the three that showed the intent of trying three different routes that ultimately give the same impact on performance: increased endurance, reduced shortness of breath, tiredness," he said.
CNN has reached out to the CAS and the parties involved in Valieva's arbitration hearing to confirm the validity of the document published by the Dossier Center and has yet to hear back.
CNN has also reached out to the WADA-accredited lab in Sweden that tested Valieva's sample from December for comment.
This post has been updated to add details and include attribution of Valieva's test results.