... Select a Journal or Book ... 1 J cm −2 ), followed by the biguanidine−porphyrin and the porphyrin−MLS (IC 50 = 8.2 µM and 9.8 µM at 1 J cm −2 ... The resin was filtered, washed with TFA (3 × 2 mL), and the filtrates combined and evaporated under vacuum to give a green residue ...