https://www.thevespiary.org/rhodium/Rhodium/chemistry/oxycodone.html (https://www.thevespiary.org/rhodium/Rhodium/chemistry/oxycodone.html)
https://www.thevespiary.org/rhodium/Rhodium/pdf/hydroxycodeinone-2.pdf (https://www.thevespiary.org/rhodium/Rhodium/pdf/hydroxycodeinone-2.pdf)