ETRYPTAMINE (MONASE®), similar to the hallucinogenic tryptamines, is an inhibitor of monoamine oxidase, introduced for use as an antidepressant. It was withdrawn from the market due to problems with agranulocytosis and other side effects. However, it's activity is still under scientific investigation.

δ-Tocopherol (δ-T) is a chiral organic molecule belonging to the group of tocopherol, that vary in their degree of methylation of the phenol moiety of the chromanol ring. It was revealed, that δ-Tocopherol had a more potent anticancer activity in solid tumors compared to the other tocopherols, δ-T possessed antileukemic activity of in acute myeloid leukemia (AML). δ-T induced tumor cell death through peroxisome proliferator-activated receptor γ (PPAR-γ) induction, cyclin-D1 inhibition, and modulation of redox balance. In addition, on animal models was found, that δ-tocopherol was more active than α- or γ-tocopherol in inhibiting lung tumor growth, possibly through trapping reactive oxygen and nitrogen species and inducing apoptosis.