GC analysis is a method of choice for volatile oilcontaining drugs. Molecular biology methods are important, particularly with microbial identication, although they are gaining popularity in the identication of plants also; however, these techniques are not utilized regularly, but they are very precise and can differentiate the adulteration within species.The classical method for extraction often used harsh techniques such as boiling solvents, acidbase extraction, and steam distillation; it suffers high solvent consumption as well as is timeconsuming.As isolation technologies have improved, the extraction conditions have become milder by using ultrasound, and pressure; nowadays, extraction with ionic liquids. In comparison to other, accelerated solvent extraction methodology is applied to solid and semisolid samples in gscale using common solvents at elevated temperature and pressure. Automation made this easy, and up to samples can be extracted simultaneously.Another popular technique is supercritical uid extraction. The high consumption of organic solvent in classical methods caused environmental disturbances.SFE is an attractive alternative to traditional solidliquid extraction with lower solvent usage and lower working temperature.It is a type of liquid extraction where a supercritical uid substance that is above its critical point replaces the usual liquid solvent phase.Because of its comparatively low critical temperature, carbon dioxide is basically the only accessible supercritical extraction solvent used.An organic solvent may be added to the supercritical uid to enhance its solvating properties. The advancement of new hyphenated technology based on sophisticated detection methods makes rapid online identication of the constituents possible up to a minimum of g.It has been explained that natural productbased compounds have more diversity with more chance of getting druglike molecules from natural productbased library; hence, both companies and academia are focusing on creating libraries of natural products. Within about years, the natural product pool comprised more than compounds derived from more than laboratories in. Within a couple of years, around nonredundant substances were extracted from plants, bacteria, and fungi, of which were selected randomly and categorized by their key structural element.High number of obsolete and omnipresent substances was the biggest problem to be solved.Puried NP libraries can be created by inhouse extraction, isolation, and purication or by commercial sources.Many of bioactive compounds have been discovered in the past, but their bioactivity has not been investigated for various reasons.Through modern screening procedures, a number of these compounds are rediscovered, and other activities become apparent. This concept is analogous to diversityoriented synthesis or more accurately, a natural productlike synthesis, hence biologyoriented synthesis.Nowadays, a number of sophisticated hyphenated techniques, for example, B.This accelerates the entire progression of natural productbased drug discovery drastically. The mass spectra obtained provide the indispensable information about the separated molecule.Even if the molecule is known, its structure can be reconstructed by analyzing the mass spectra.The important advantage of MS analysis is that minute quantity of sample is required for complete analysis.Generally, soft ionization techniques are used in MS, which produces molecular ion peaks.However, the tandem mass spectrometry produces collisioninduced fragments of the produced molecular ion.When it is coupled with MS, the technique is called CEMS.This hyphenated technique is used for the separation and analysis of biomolecules, including natural products yielding the molecular weight and structural properties of separated molecules.