Dr. Alfredo Santos is recognized for his research in the chemistry of natural products. He has done a lot of work in the isolation and elucidation of the phaeantharine and other alkaloids from Philippine medical plants. For 45 years, Dr. Santos served in various capacities at the University of the Philippines until he retired in 1965 as Dean of the College of Pharmacy. After his UP stint, Dr. Santos continued to do research at the UST Research Center and the National Institute of Science and Technology (NAST). In recognition of his original experimental researches in numerous alkaloids isolated from Philippine medicinal plants, Dr. Santos received Pres. Magsaysay's Distinguished Service Star in 1954. He is also recipient of the 1953 Outstanding Pharmacist Researcher of the Philippine Pharmaceutical Association and the 1973 PhilAAS Outstanding Scientist Award.