“…The low level of (8)(9)(10)(11)(12)(13)(14) a Cells were exposed under optimal culture conditions in 96-well plates to four concentrations of the compounds (10, 100, 200, 500 M for the new compounds and 1, 10, 100, 200 for actinomycin D, respectively) or control medium for 20 h before determining cellular metabolic activity by a MTS tetrazolium compound bioreduction assay. The low level of (8)(9)(10)(11)(12)(13)(14) a Cells were exposed under optimal culture conditions in 96-well plates to four concentrations of the compounds (10, 100, 200, 500 M for the new compounds and 1, 10, 100, 200 for actinomycin D, respectively) or control medium for 20 h before determining cellular metabolic activity by a MTS tetrazolium compound bioreduction assay.…”