Safotibant (previously known as LF22-0542) was developed as an antagonist at bradykinin B1 receptor for the topical treatment of diabetic macular edema. This drug participated in phase II clinical trials in Australia, in Belgium and in the Czech Republic. However, further, development was discontinued.

Briciclib (also known as ON-013105 and ON-014185) has the potential of targeting and inhibition of eukaryotic translation initiation factor 4E (eIF4E) for solid cancers. eIF4E is a proto-oncogene that promotes translation of several genes essential for cellular proliferation (cyclin D1, c-Myc, mTOR), survival (Akt), angiogenesis (VEGF), and metastasis (MMP9). Overexpression of eIF4E has been observed in almost all major groups of cancers and has been shown to induce increased expression of cyclin D1 and c-Myc). An intravenous formulation of briciclib was being investigated in the Phase 1 clinical trial. The purpose of the study was to determine the highest dose of briciclib that could be given safely in patients with relapsed/refractory Lymphoma or B-cell Acute Lymphocytic Leukemia (Philadelphia chromosome negative). However, this study was terminated because of the lack of available clinical drug supply. In addition, briciclib was also involved in phase I clinical trials with advanced cancer and solid tumors, to determine the highest dose that can be safely given.

Briciclib (also known as ON-013105 and ON-014185) has the potential of targeting and inhibition of eukaryotic translation initiation factor 4E (eIF4E) for solid cancers. eIF4E is a proto-oncogene that promotes translation of several genes essential for cellular proliferation (cyclin D1, c-Myc, mTOR), survival (Akt), angiogenesis (VEGF), and metastasis (MMP9). Overexpression of eIF4E has been observed in almost all major groups of cancers and has been shown to induce increased expression of cyclin D1 and c-Myc). An intravenous formulation of briciclib was being investigated in the Phase 1 clinical trial. The purpose of the study was to determine the highest dose of briciclib that could be given safely in patients with relapsed/refractory Lymphoma or B-cell Acute Lymphocytic Leukemia (Philadelphia chromosome negative). However, this study was terminated because of the lack of available clinical drug supply. In addition, briciclib was also involved in phase I clinical trials with advanced cancer and solid tumors, to determine the highest dose that can be safely given.

Oxi0-4503 (now known as combretastatin A1 phosphate), a diphosphate prodrug of combretastatin A1, was developed by Mateon therapeutics as a second-generation, dual-mechanism vascular disrupting agent from the combretastatin family. On November 21, 2012, Oxi-4503 has been granted orphan designation by the US Food and Drug Administration for the treatment of acute myelogenous leukemia. It is known that the orphan drug designation qualifies a company for several benefits, including the potential for market exclusivity, development grants, and tax credits. Oxi0-4503 is currently participating in phase I/II clinical trial the treatment of patients with acute myelogenous leukemia or myelodysplastic syndrome. In addition, phase I clinical trial was successfully completed where was studied the safety of Oxi0-4503 in patients with advanced solid tumors.

Octriptyline was used as an antidepressant, however, it has never been marketed.

Butinoline (also known as azulone) was used as an antispasmodic drug to treat gastritis.

SP-2086 H3PO4 (Retagliptin Phosphate), tetrahydro-imidazo[1,5-a] pyrazine derivative, is a competitive DPP-4 inhibitor innovated in China under development by Jiangsu Hengrui Medicine for the treatment of Type 2 diabetes. In completed phase II trials, retagliptin monotherapy or in combination with metformin significantly decreased the HbA1c level in type 2 diabetic patients. Two phase III trials for retagliptin monotherapy aCnd in combination with metformin, respectively, were ongoing in China. Jiangsu Hengrui Medicine withdrew its application from the Chinese FDA in April 2016 but is expected to refile the application.

Motesanib (AMG 706), a novel nicotinamide, was identified as a potent, orally bioavailable inhibitor of the VEGFR1/Flt1, VEGFR2/kinase domain receptor/Flk-1, VEGFR3/Flt4 and Kit receptors. Motesanib was expected to reduce vascular permeability and blood flow in human tumours. A phase III trial of motesanib in combination with paclitaxel and carboplatin in non-squamous NSCLC has been terminated by Takeda and subsequently the development was discontinued. Motesanib has also been investigated up to phase II in breast, thyroid, colorectal and gastrointestinal stromal tumours. However, development has been discontinued in these indications.

Enpiroline (WR 180,409) is an antimalarial compound. It demonstrates activity against Plasmodium falciparum both in vitro and in non-immune infected subjects. Additionally, it exerts antischistosomal activity.

Flosfluridine tidoxil, a thymidylate synthase inhibitor that was developed for the treatment of actinic keratosis and solid tumors, e.g. breast and colorectal cancers. These studies were suspended and information about the further development of this drug is not available.