Torres, C.A., Zamora, C.M.P., Nuñez, M.P. & Gonzales, A.M., 2023. In: Martinez et al (eds.): Ethnobotany: from the Traditional to Ethnopharmacology. CRC Press, Florida.
Published in February 2023, this book can be viewed free on Google Books. Chapter 3 deals with the medicinal and other chemical uses of cacti, and is a fascinating read. Who knew there were so many different useful chemicals to be obtained from so many different plants.