Phenampromide is an opioid analgesic, which is considered to be structurally similar to isomethadone. Phenampromide belongs to the ampromide family of drugs, which also include propiram and diampromide. According to the literature, (R)-phenampromide has greater analgesic potency than its (S)-enantiomer. Synthetic narcotic analgesic phenampromide is under international control according to the UN Single Convention 1961 and its amendments, Schedule I.

Butobendine is trihydroxybenzoic acid derivative with marked antiarrhythmic activities in rats and cats.

Clonitazene is a synthetic opioid analgesic, structurally related to etonitazene. In the USA clonitazene is a schedule I narcotic controlled substance.

Monophosphothiamine is thiamine derivative used for the treatment of neuritis, polyneuritis, asthenic conditions (weakness), as an additional remedy for chronic blood circulation insufficiency, chronic gastritis accompanied by motor and secretory disorders functions of the stomach. Monophosphothiamine underwent metabolic phosphorylation to active metabolite thiamine pyrophosphate, that acts as a coenzyme in the different metabolic process.

Camptothecin-20(S)-O-propionate (CZ48) is a prodrug of camptothecin, an alkaloid isolated from the Chinese tree Camptotheca acuminata, with potential antineoplastic activity. Upon entry into cells, camptothecin-20(S)-O-propionate is hydrolyzed by esterases into the active form camptothecin. Camptothecin selectively stabilizes topoisomerase I-DNA covalent complexes, thereby inhibiting religation of topoisomerase I-mediated single-strand DNA breaks and producing potentially lethal double-strand DNA breaks when encountered by the DNA replication machinery. CZ48 is being investigated in clinical trials for the treatment of advanced solid tumors and lymphomas.