2'-Hydroxy-4'-methylacetophenone, a phenolic compound isolated from Angelicae koreana roots possesses acaricidal property. It could be used in the preparation of 4’-methyl-2’-[(p-tolylsulfonyl) oxy] acetophenone.

2-mercaptoethane sulfonate (Mesna), is a synthetic small molecule, widely used as a systemic protective agent against chemotherapy toxicity, but is primarily used to reduce hemorrhagic cystitis induced by cyclophosphamide.

2-NBDG is a fluorescent indicator for direct glucose uptake measurement and also is an indicator of cell viability.

2''-O-Rhamnosylicariside II is a flavonoid glycoside compound and might be beneficial for improving postmenopausal osteoporosis.

2-Phenyl-2-(1-piperidinyl)propane is an analog of phencyclidine that acts as a mechanism-based inactivator of human cytochrome P450 (CYP) 2B6 (Ki = 5.6 µM; IC50 = 5.1 µM).

2-Phenylethanol (Phenethyl alcohol), extracted from rose, carnation, hyacinth, Aleppo pine, orange blossom and other organisms, is a colourless liquid that is slightly soluble in water. It has a pleasant floral odor and also an autoantibiotic produced by

3,3'-Diindolylmethane(DIM) is a major digestive product of indole-3-carbinol, a potential anticancer component of cruciferous vegetables.

3,4-Dicaffeoylquinic acid (3,4-DCQA) is a polyphenol with diverse biological activities.

3,4-Dimethoxycinnamic acid (O-Methylferulic acid) is a monomer extracted and purified from Securidaca inappendiculata Hassk. 3,4-Dimethoxycinnamic acid exerts anti-apoptotic effects on L-02 cells via the ROS-mediated signaling pathway. Anti-apoptotic effe

3,5-Dicaffeoylquinic acid (3,5-DCQA) is a natural phenolic compound that has been found in L. japonica, I. kaushue, and other plants.It has antioxidant, anti-inflammatory, and antiviral biological activities.

3-Acetylaconitine, aconitine, and deoxyaconitine are main toxic components of the roots of Aconitum pendulum.

3BDO is a new mTOR activator which can also inhibit autophagy.

3b-Hydroxy-5-cholenoic acid is a monohydroxy bile acid of endogenous origin and could be found in children with the syndrome of hepatic ductular hypoplasia.

3-Cyano-7-ethoxycoumarin is a fluorescent P450 substrate (excitation/emission wavelengths = 408/455 nm); metabolized to cyano-hydroxycoumarin.

3-Cyanochromone is a potent gram-negative bacteria WcbL protein inhibitor with IC50 of 28 uM in a competitive enzyme-inhibition model, shows inhibition constants Ki of 10 uM..

3-Deazaadenosine (hydrochloride) is an inhibitor of S-adenosylhomocysteine hydrolase, with a Ki of 3.9 µM; 3-Deazaadenosine has anti-inflammatory, anti-proliferative and anti-HIV activity.

3-Ethoxy-5,6-dibromosalicylaldehyde is a potent and selective inhibitor of IRE1 endoribonuclease with IC50 of 0.12 uM.

3-Indolebutyric acid (IBA)

3-Methoxyphenylacetic acid is a monocarboxylic acid.

3-methyl toxoflavin. Toxoflavin acts as a pH indicator, changing between yellow and colorless at pH 10.5.

3-Methyl-2-oxovaleric acid is a neurotoxin, an acidogen, and a metabotoxin, and also an abnormal metabolite that arises from the incomplete breakdown of branched-chain amino acids.

3PO is a PFKFB3 (6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase) inhibitor; reduces glycolytic flux and suppresses glucose uptake.