PHA-793887 is an inhibitor of multiple cyclin dependent kinases (CDK) with activity against CDK2, CDK1 and CDK4. PHA-793887 was cytotoxic for leukemic cell lines in vitro, with IC(50) ranging from 0.3 to 7 uM. In colony assays PHA-793887 showed very high activity against leukemia cell lines, with an IC(50) <0.1 uM indicating that it has efficient and prolonged antiproliferative activity. PHA-793887 induced cell-cycle arrest, inhibited Rb and nucleophosmin phosphorylation. PHA-793887 has promising therapeutic activity against acute leukemias in vitro and in vivo.

L-MTX is a second-generation tau protein aggregation inhibitor. It acts by reducing levels of aggregated or misfolded tau proteins, which are associated with the progressive neurodegeneration. It is currently under development for the treatment of Alzheimer’s disease.

Ethylmethylthiambutene is a potent analgesic compatible with morphine. It possesses addiction liability similar to that of morphine.

Acridine carboxamide (XR5000) is a tricyclic acridine-based (or carboxamide-based) drug with dual topoisomerase inhibitor and potential antineoplastic activities. Acridine carboxamide inhibits both topoisomerases I and II and intercalates into DNA, resulting in DNA damage, the disruption of DNA repair and replication, the inhibition of RNA and protein synthesis, and cell death. Acridine carboxamide has been used in trials studying the treatment of lung cancer and brain and central nervous system tumors. In clinical trials acridine carboxamide did not show efficacy when tested against various types of cancers.

HM-30181 is a highly selective and potent inhibitor of Multi-drug resistance 1 (MDR1, ABCB1), also known as P-glycoprotein (P-gp). Co-administration of HM30181 greatly increased oral bioavailability of tubulin-stabilizing chemotherapeutic agent paclitaxel. Oraxol is an oral dosage form of paclitaxel administered orally with the HM30181A molecule. Oraxol offers patients with paclitaxel-responsive tumors the possibility of oral therapy without the requirement for premedication to prevent infusion-related hypersensitivity-type reactions. Current clinical data suggests the promising potential of a better clinical response and tolerability profile, which can likely to be attributed to the better pharmacokinetic profile achieved. Oraxol is presently in a Phase 3 trial in metastatic breast cancer and poised to enter into a combination study for treatment of advanced gastric cancer with ramucirumab through a clinical trial collaboration with Eli Lilly and Company.

Etoxeridine (Carbetidine or Wy2039), a piperidine derivative, is a narcotic analgetic.

Esuberaprost (314d) is an active enantiomer of beraprost, a prostacyclin analog. The pharmacologic action of esuberaprost is mediated by specifically binding to PGI2 receptors in smooth muscle cells (the blood vessel’s endothelium) and platelets. Upon binding, the compound widened blood vessels, preventing the formation of blood clots, and lowering blood pressure in the lungs. As a result, it was expected to improve the symptoms of pulmonary arterial hypertension. United Therapeutics announced it has ended its Phase 3 BEAT trial testing esuberaprost as an add-on therapy to its product Tyvaso (inhaled treprostinil) for clinically symptomatic patients with pulmonary arterial hypertension (PAH). According to a company press release, the study failed to reach its main endpoint of delaying the time to first clinical worsening events.