Synthetic: synthetic substance or synthetic compound refers to a substance that is man-made by synthesis, rather than being produced by nature. It also refers to a substance or compound formed under human control by any chemical reaction, either by chemical synthesis or by biosynthesis.
Semisynthesis: Semisynthesis, or partial chemical synthesis, is a type of chemical synthesis that uses chemical compounds isolated from natural sources (such as microbial cell cultures or plant material) as the starting materials to produce other novel compounds with distinct chemical and medicinal properties.
Natural compounds: Natural compounds (NC), which are chemical compounds produced by living organisms, have been a significant source of traditional medicine. Usually, plant extracts or herb remedies have been prescribed to treat various afflictions in most countries