Compound 1 was synthesised using a literature procedure. 1,9-Diaminoacridinone (100 mg, 0.44 mmol) was dissolved in dry DMF (5 mL) and stirred under nitrogen. Separately, phenyl isocyanate (0.15 mL, 1.33 mmoL) was dissolved in DMF (1 mL) and added dropwise to the first solution. This reaction was left for 3 h, by which time a light brown precipitate had formed. This precipitate was filtered, suspended, and sonicated in 1:1 v/v diethyl ether/hexane (100 mL) for 30 min and then filtered again. This was washed with further portions of diethyl ether (3 x 30 mL) before being dried in vacuo to yield a brown solid (127.5 mg, 0.27 mmol, 62%). Analytical data matched that of this compound in the literature. Mp = 361-364 °C (decomposition) Please do not adjust margins Please do not adjust margins water (25 mL) and a precipitate formed, which was filtered. This precipitate was then washed with water (3 x 30 mL), hexane (3 x 15 mL), and suspended in 1:1 v/v ethyl acetate/hexane (50 mL) before being sonicated for 30 min. The solid was again filtered, washed with a further portion of 1:1 50% ethyl acetate/hexane, then dried in vacuo (83 mg, 0.14 mmol, 63%). Mp = 333-336 °C (decomposition) Separately, 3,5-bis(trifluoromethyl)phenyl isocyanate (0.15 mL, 0.889 mmol) was dissolved in DMSO (2 mL), and this was added dropwise to the reaction mixture. The reaction was left to stir for 15 min. Next, the solution was poured onto ice-cold deionised water (25 mL), and a green precipitate formed, which was filtered. This precipitate was then washed with water (3 x 30 mL) and hexane (3 x 15 mL). The solid was washed with a further portion of 1:1 v/v diethyl ether/hexane solution and dried in vacuo to give a light green powder (90 mg, 0.12 mmol, 55%