*4.1. Materials*

All kinds of cell culture-related agents were purchased from Life Technologies Inc (Grand Island, NY, USA). β-Caryophyllene, camphor, 1,8-cineole, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT), 3,3'-dihexyloxacarbocyanine iodide (DiOC6), propidium iodide (PI), bisacrylamide, sodium dodecyl sulfate (SDS), dimethyl sulfoxide (DMSO), RNase A, and other chemicals were purchased from Sigma Chemical Co. (St.Louis, MO, USA). *N,N,N',N'*-tetramethyl-ethylenediamine dihydrochloride (TEMED) were purchased from Bio-Rad Laboratories (Portland, ME, USA). The following antibodies for caspase-3, Bcl-2, Bcl-XL, Bad, CDK2, CDK4, CDK6, Cyclin D1, Cyclin E, p21CIP1/WAF1, p27KIP1, RB, and β-actin were purchased from Santa Cruz Biotechnology Inc. (Santa cruz, CA, USA). p-RB antibody was purchased from Cell Signaling Technology (Danvers, MA, USA). The antibodies for caspase-8 and caspase-9 were purchased from BD Biosciences, Pharmingen (San Diego, CA, USA). z-VAD-fmk was purchased from Calbiochem (Bad Soden, Germany).
