https://www.thevespiary.org/rhodium/Rhodium/pdf/isosafrole2piperonal.electrochem.pdf (https://www.thevespiary.org/rhodium/Rhodium/pdf/isosafrole2piperonal.electrochem.pdf)
https://www.thevespiary.org/rhodium/Rhodium/pdf/isosafrole2piperonal.electrochem2.pdf (https://www.thevespiary.org/rhodium/Rhodium/pdf/isosafrole2piperonal.electrochem2.pdf)