https://patents.google.com/patent/WO2003093258A2/en (Any fulltext)
Hernandez Alvarez, B., Fischer, G., Braun, M., Hessamian-Alinejad, A., & Fliri, H.(2003). Novel spiro ketone and carboxylic acid derivatives as specific inhibitors for (po3h2) ser/(po3h2)thr-pro-specific peptidyl-prolyl-cis/trans-isomerases.