"The complaint said that testing showed the presence of Higenamine and Paeonol, both supplements with no traditional performance-enhancing properties."
This is not accurate. Higenamine apparently is a well known performance enhancer
from the Usada.org site
"Higenamine can act as an anti-asthmatic to open up airways
, and may be cardiotonic
, which means that it can strengthen the heart contraction to increase cardiac output"