Complex sentence: Piperonal has powerful aromatherapeutic qualities which appear to elevate mood and general well-being, and has shown in tests done by the Memorial Sloan-Kettering Cancer Center in New York to reduce the anxiety of patients receiving an MRI by as much as 63 percent.
Split into simpler sentences: Piperonal has powerful aromatherapeutic qualities which appear to elevate mood and general well-being. Tests preformed by the Memorial Sloan-Kettering Cancer Center in New York to reduce the anxiety of patients receiving an MRI by as much as 63 percent.