Feclemine is a spasmolytic agent.

Foretinib is an orally available multikinase inhibitor that targets c-MET and VEGFR2 with high affinity, which may result in the inhibition of tumor angiogenesis, tumor cell proliferation and metastasis. Foretinib is an experimental drug candidate for the treatment of cancer. It was in Phase II trials for the treatment breast cancer, non-small cell lung cancer, gastric cancer, head and neck cancer and papillary renal-cell carcinoma. The most frequent adverse events of any grade associated with foretinib were fatigue, hypertension, gastrointestinal toxicities, and nonfatal pulmonary emboli.

Metrazifone was developed as an analgesic agent. However, this drug has never been marketed.

Adaprolol is a beta-adrenergic antagonist that is being developed as a topical agent to treat glaucoma. Adaprolol demonstrated a safer cardiovascular profile, especially in the population over 70 years old. It was in Phase II clinical trials for the treatment of glaucoma. This research has been discontinued.

MK-2866 (Gtx-024) is a selective androgen receptor modulator (SARM) for treatment of conditions such as muscle wasting and osteoporosis. It is a non-steroidal agent with anabolic activity designed to work like testosterone, thus promoting and/or maintaining libido, fertility, prostate growth, and muscle growth and strength. Mimicking testosterone's action, this agent may increase lean body mass, thereby ameliorating muscle wasting in the hypermetabolic state of cancer cachexia.

Daltroban (also known as BM 13505, SKF 96148), a specific thromboxane A2 receptor antagonist, was studied as an antithrombotic agent. The drug was licensed to Smith Kline Beecham, underwent phase III clinical trials in the UK and Germany as an antithrombotic agent but did not enter clinical trials in the USA. Besides, вaltroban was investigated in patients with an ischemic heart disorder. However, the development of daltroban has been discontinued.

CYT997 (Lexibulin) is a wholly synthetic compound that possesses highly potent cytotoxic activity in vitro through inhibition of microtubule polymerization. CYT997 (Lexibulin) is a potent microtubule polymerization inhibitor with IC50 of 10-100 nM in cancer cell lines. CYT997 (Lexibulin) blocks the cell cycle at the G(2)-M boundary, and Western blot analysis indicates an increase in phosphorylated Bcl-2, along with increased expression of cyclin B1. Caspase-3 activation is also observed in cells treated with CYT997 (Lexibulin) along with the generation of poly(ADP-ribose) polymerase. The compound possesses favorable pharmacokinetic properties, is orally bioavailable, and is efficacious per os in a range of in vivo cancer models, including some refractory to paclitaxel treatment. CYT997 (Lexibulin) exhibits vascular disrupting activity as measured in vitro by effects on the permeability of human umbilical vein endothelial cell monolayers, and in vivo by effects on tumor blood flow. CYT997 (Lexibulin) possesses a useful combination of pharmacologic and pharmacokinetic properties having considerable potential as a novel anticancer agent. Lexibulin was being developed by YM BioSciences as a vascular-disrupting agent (VDA) for the potential treatment of cancer, it was in phase II development on YM BioSciences ' pipeline. It appears that the development of lexibulin has been discontinued.

Terbogrel, an agent having two pharmacodynamic actions, namely inhibition of thromboxane A2 synthase and antagonism of the thromboxane A2 receptor. The antithrombotic effect of terbogrel was dose-dependent and was associated with enhanced prostacyclin production. The drug was studied for the treatment of peripheral vascular disorders, pulmonary hypertension, and thrombosis. Terbogrel participated in phase II clinical trial to investigate its safety and efficacy in patients with primary pulmonary hypertension, however, this study was discontinued due to terbogrel’s induction of leg pain.

Denibulin is a novel antineoplastic agent. Denibulin selectively targets and reversibly binds to the colchicine-binding site on tubulin and inhibits microtubule assembly. This results in the disruption of the cytoskeleton of tumor endothelial cells, ultimately leading to cell cycle arrest, blockage of cell division and apoptosis. This causes inadequate blood flow to the tumor and eventually leads to a decrease in tumor cell proliferation. Denibulin hydrochloride had been in phase I clinical trials for the treatment of solid tumours. It was generally well tolerated and showed decrease in tumor vascular parameters. However, no recent development has been reported.

Mespiperone C-11 (3-N-[11C] methylspiperone) is a radiolabeled 3-N-methylspiperone. 3-N-methylspiperone is high-affinity D2/3 dopamine and 5-HT2A serotonin receptor antagonist. It has been studied as a positron emission tomography (PET) tracer for imaging D2/3 and 5HT2A receptor densities.