title: Cation radicals of tetraalkylporphyrins.
mesh_terms: D000478:Alkylation; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D008745:Methylation; D011166:Porphyrins / Q000032:analysis* / Q000145:classification; D015032:Zinc / Q000032:analysis
chemical_list: D005609:Free Radicals; D011166:Porphyrins; D015032:Zinc