The purpose of this Task Order is to characterize the plasma pharmacokinetics (PK) of small molecule anticancer compounds in mice as outlined below. Rapid turn-around is required. There is a base period and options under this task order. For the base period: 1. Use a standard LC-MS/MS bioanalytical approach for quantification of a small drug-like molecule in mouse plasma. A “generic” assay platform is acceptable and validation to full FDA bioanalytical guidance is not required. An internal standard will be identified and used as a measure of acceptable assay performance. An LLOQ of <10 ng/mL is desirable. 2. It is anticipated that most, if not all, studies will be performed using NSG mice. The NCI will supply the mice for each study to the extent possible, but please include plans for acquisition from an outside vendor should the need arise. 3. Carry out the appended protocol for a mouse PK study with compound(s) that will be provided by the NCI. The protocol specifies 2 (likely unrelated) compounds, 1 route of administration, 8 collection time points for each route, and 3 mice/time point, for a total of 48 plasma samples to be generated for analysis. Appropriate blanks, standards, and QC samples should be included. Novel blood sampling procedures, including micro-bleeds, may be proposed by the offeror. 4. Pharmacokinetic data analysis should include standard non-compartmental modeling to determine Cmax (po), C0 (iv), Tmax, AUC0∞, AUClast, CL, and t½, Vss (or Vd), and %F for each compound to the extent permitted by the data obtained. For Options 1 - 9: 1. For each Option the contractor shall perform PK/bioavailability studies as outlined under “Base Period” for one or two additional compounds per Option. Minor adjustments to the protocol that should not affect cost or schedule (e.g., routes of administration, specific sampling times) may be made. For example, a single route of administration may be used to evaluate two compounds or one compound may be evaluated using two dose levels. Options may be exercised at any time within the Task Order period of performance