Systems and methods of conducting a payment transaction using a mobile phone having a camera. Mating connectors are connected coaxially, and coupled together by means of a threaded connection. The isolation methods extract procyanidin B2 from a sample of bark powder from plant matter of the genus Uncaria. The process is conducted under superatmospheric hydrogen partial pressure to effect at least 20% conversion, with at least 50% of the converted product remaining in the boiling range of about 330 to about 730 F.