Seneciphylline N-oxide38710-26-8100 % similar Acetylseneciphylline N-oxide123844-00-872 % similar Senecionine N-oxide13268-67-268 % similar Seneciphylline480-81-962 % similar Acetylseneciphylline90341-45-044 % similar Senecionine130-01-838 % similar