Compound

Without protein

With BSA (c = 10 μg/ml)

With BSA after 1 hour (c = 10 μg/ml)

λ (nm)

A

λ (nm)

A

λ (nm)

A

1c

270

0.383

270

0.306

268

0.215

427

0.551

429

0.529

429

0.391

4a

340

0.461

336

0.389

335

0.159

4c

271

0.485

268

0.376

272

0.232

416

0.511

403

0.450

409

0.233

2b

260

0.279

261

0.303

233

0.605

382

0.460

382

0.490

393

0.139