Similarly, other traditional systems of medicine produced a huge wealth of knowledge.By, approximately of approved medicinal products were either originated from naturally occurring compounds or were motivated by a natural product.The importance of natural products has been extensively reviewed and it was found that out of the new drugs introduced between and, of the smallmolecule approved drugs were either natural products or derived from natural products and another were created around a pharmacophore from a natural product. Plants use these secondary metabolites for defense and signaling.Thus, they are important for the survival and reproductive tness of plants.Secondary metabolites, therefore, represent adaptive characters that have been subjected to natural selection during evolution. Several specic interactions of secondary metabolites with proteins and other cellular components have been discovered.Structures of these metabolites appear to have been shaped during evolution in such a way that they can mimic the structures of endogenous substrates, hormones, neurotransmitters, or other ligands. Hence, these compounds are results of an evolutionary relation, and the internal signaling pathways respond to many of the primordial exocrine signaling systems found today in ancient marine animals as well as in the plants. Parallel discovery of high throughput screening and the knowledge of molecular targets of diseases, along with the introduction of combinatorial chemistrybased synthesis, dramatically shifted efforts toward the synthetic medicinal chemistry.Natural products are biosynthesized in small amounts and present in extracts as mixtures, isolation of which is an effortful and tedious procedure.Obtaining additional quantities for preclinical development requires a largescale reacquisition or fermentation that would have a signicant impact on the growth timeline.When screening natural product libraries, rediscovery of known compounds is a major problem.This is due to the lack of active dereplication methodologies.Natural products are often complex in terms of structure.It is often difcult to alter the complex natural products using organic chemistry.To meet the above challenges, various concepts have emerged in the natural productbased drug discovery.Natural productlike compounds can be obtained either by isolation or synthesis based on natural products.These two categories can be classied further according to different concepts involved in methodology, and has been discussed in subsequent subheads.Around, higher plant species have been estimated, and only of that has been investigated pharmacologically and phytochemically. Synthetic chemistry and natural sources are two major sources for these compounds of interest.Subsequent validation steps required for lead identication, preclinical development, and clinical development at the discovery level of molecules from plants involve several crucial steps such as plant selection, extraction, isolation, and characterization before its biological testing.In these systems, to prevent or control complex diseases, many herbal preparations are considered ideal than a single active ingredient.Studies have shown the ability of plant metabolites such as quercetin, catechins, resveratrol, piperine, and curcumin to potentiate the activity of various anticancer drugs. Various digital platforms, databases, and documents have been compiled to keep this information in a B.Various plants have been classied according to their traditional uses; this information can be used to choose plant material to isolate compounds of interest.Primary way of authentication is morphological as well as anatomical analysis, based on texture and organoleptic properties.