In this task, you are given a sentence. You are expected to recognize the name of any form of chemical substances. Although there might be several correct answers, you need to write one of them.

Efficacy and safety of the factor VIII/von Willebrand factor concentrate, haemate-P/humate-P: ristocetin cofactor unit dosing in patients with von Willebrand disease.
ristocetin

Neonatal epileptic encephalopathy caused by mutations in the PNPO gene encoding pyridox(am)ine 5'-phosphate oxidase.
pyridox(am)ine 5'-phosphate

Synthesis of C17-OH-north unit of ritterazine G via "Red-Ox" modifications of hecogenin acetate.

ritterazine G