Also known as succinic acid, it is very rare to find in the plant kingdom. In seabuckthorns, together with malic acid, oxalic acid, quinine acid, coffee acid, tartaric acid, amber acid forms a unique composition. It lowers the toxic effects of antibiotics and the harmful impact of X-rays. It also reduces the ill effects caused by various stress factors. It is used to treat multiple sclerosis, epilepsy, atherosclerosis, heart and blood vessel sclerosis, hepatic illnesses and various illnesses affecting the central nervous system.