Ketones

1,5-Diphenyl-penta-2,4-dien-1-one is a natural compound that has been shown to have cytotoxic activity against human pathogens. It has been shown to inhibit the growth of gram-positive bacterial species by binding to dipole groups and preventing the formation of an enzyme complex required for cell division. 1,5-Diphenyl-penta-2,4-dien-1-one also inhibits the production of pyrazolines from benzoates in bacteria. When this molecule is metabolized by bacteria, it forms an aliphatic hydrocarbon with a chemical structure similar to that found in some carcinogens. 1,5 -Diphenyl penta 2,4 dien 1 one can be detected using NMR spectroscopy because it has a unique molecular structure. This compound also exhibits pharmacokinetic properties that are different from those of other molecules.

(4-Bromophenyl)cyclopropylmethanone is a cyclopropane derivative that can be synthesized from 4-bromobenzaldehyde and cyclopropylmagnesium bromide. It is an important precursor to fluoroquinolones in the pharmaceutical industry, as well as to other derivatives used in the synthesis of antihistamines and antimalarial drugs. This compound has been shown to have biomolecular mediated intramolecular cyclopropane ring formation and pentacyclic cyclopropane ring formation.

4-Phenyl-2-butanone is an organic compound that is used as a solvent. It has been shown to be effective against a wide range of bacteria, including Gram positive and Gram negative bacteria. 4-Phenyl-2-butanone disrupts the cell membrane by binding to glycol ether, which is an important part of the lipid bilayer. It also inhibits the synthesis of two important molecules in bacterial cells, dinucleotide phosphate and phospholipids. This process leads to bacterial cell death. 4-Phenyl-2-butanone also has antimicrobial properties due to its ability to destroy water vapor and inhibit growth of microorganisms on skin.