Table 3: IC50 (μg/mL) values of PS1 and 2a2e against A549 cells at various incubation times. IC50 values were determined by MTT assay at 3 h, 24 h and 48 h incubation after photo irradiation.

Compound3 h24 h48 h

114.810.58.72
2a7.145.324.32
2b12.067.246.38
2c20.5314.4313.05
2d20.5218.5112.95
2e24.2322.1211.82