In Vitro Cellular Activities of 21.

a

Cancer cells were purchased from Nanjing KeyGen Biotech Co. Ltd, and subcultured by State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University.

b

The description was abstracted by the reference [27].

c

Antiproliferative activity was measured using the WST-1 assay. Values are the average of two independent experiments run in triplicate. Variation was generally 5%.

d

NSCLC: non-small-cell lung cancer.