3,3′-Diiodo-L-thyronine (3,3′-T2) is an endogenous metabolite of thyroid hormone. 3,3′-Diiodo-L-thyronine significantly enhances COX activity.

This is a Chinese Pharmacopoeia compound.

3,4-Benzocoumarin is a kind of the expanded structure of coumarin derivatives.Coumarin is a chemical compound in the benzopyrone chemical class that can be found in many natural species. Coumarins possess variety of biological activities and unique photophysical properties. 3,4-Benzocoumarin, a AOH‐like compound , has the sensibility of the antibody with an IC50 of 919.2 ng/mL.

3,4-DHP is an inhibitor of HRGP biosynthesis.

3,4-Dihydro-2,2-dimethyl-2H-naphtho[1,2-b]pyran is a natural product isolated and purified from the herbs of Catalpa ovata.

3,4-Dihydroxybenzylamine hydrobromide (NSC 263475 hydrobromide) is an improved dopamine analog cytotoxic and inhibits DNA polymerase activity in melanoma cells. 3,4-Dihydroxybenzylamine hydrobromide (NSC 263475 hydrobromide) displays growth inhibitory activity in melanoma cell lines with varying degrees of tyrosinase activity.

Dihydrocaffeic acid is a phenolic acid found in Gynura bicolor, reduces phosphorylation of MAPK p38 and prevent UVB-induced skin damage, with antioxidant potential and anti-inflammatory activity.

3,4-Dimethoxybenzamide is a natural product isolated and purified from the leaves of Litsea costalis (Nees) Kosterm..

3,4-Dimethoxycinnamyl alcohol is a natural product isolated and purified from the herbs of Alpinia officinarum with significant antimicrobial and cytotoxic activities.

3,4-Dimethoxyphenol is a plant-derived phenylpropanoid compound and can use as a whitening agent in cosmetics. 3,4-Dimethoxyphenol has tyrosinase-inhibiting activity. 3,4-Dimethoxyphenol has potent antioxidant effect isolated from the bacterial fermentation broth.

3,4-Dimethoxyphenyl beta-D-glucoside is a natural product isolated and purified from the herbs of Phyllanthus emblica.

3,4,4′,7-Tetrahydroxyflavan is a natural product isolated and purified from the barks of Toxicodendron verniciflua.

This is a Chinese Pharmacopoeia compound.

3,4,5-Trimethoxycinnamic acid (TMCA) is one of the constituents of Polygalae Radix and may exert anti-seizure activity by acting at the GABAA/BZ receptor complex.

3,4,5-Trimethoxycinnamyl alcohol, a natural product isolated and purified from the root of Acorus gramineus., shows significant antimicrobial and cytotoxic activities.

3,5-Dihydroxy-4′,7-dimethoxyflavone is a natural product isolated and purified from the herb of Andrographis paniculata (Burm. f.) Nees. showing antioxidant activity, it also shows significant activity against Staphylococcus aureus and Escherichia coli with minimum inhibitory concentration (MIC) at 200 ug/mL and 225 ug/mL, respectively.

3,5-Dihydroxy-4′,7-dimethoxyflavone is a natural product isolated and purified from the herb of Andrographis paniculata (Burm. f.) Nees. showing antioxidant activity, it also shows significant activity against Staphylococcus aureus and Escherichia coli with minimum inhibitory concentration (MIC) at 200 ug/mL and 225 ug/mL, respectively.

3,5-Dihydroxy-4′,7-dimethoxyflavone is a natural product isolated and purified from the herb of Andrographis paniculata (Burm. f.) Nees. showing antioxidant activity, it also shows significant activity against Staphylococcus aureus and Escherichia coli with minimum inhibitory concentration (MIC) at 200 ug/mL and 225 ug/mL, respectively.

3,5-Dimethoxyphenol is a toxin metabolite, found in human consuming yew leaves .

3,5-Diprenyl-4-hydroxybenzaldehyde is a natural product isolated and purified from the herbs of Piper aduncum..

3,6-Dimethoxyapigenin is a natural product isolated and purified from the herbs of Dodonaea viscosa.

3,6-Dimethoxyapigenin is a natural product isolated and purified from the herbs of Dodonaea viscosa.

3′-Methoxydaidzein, a natural product isolated and purified from the herbs of Derris robusta with antioxidant activity, has antiplatelet aggregation activity and appears to be specific against collagen‐induce platelet aggregation with an IC50 value of 12.3 and 61.5 uM.

3′-Methoxydaidzein, a natural product isolated and purified from the herbs of Derris robusta with antioxidant activity, has antiplatelet aggregation activity and appears to be specific against collagen‐induce platelet aggregation with an IC50 value of 12.3 and 61.5 uM.

3′-O-(TBDMS)Thymidine is a useful modified nucleoside.

3′-O-Acetylthymidine is a useful modified nucleoside.

3′-O-Methylorobol, a natural product isolated and purified from the herbs of Kadsura interior, can increase osteoblast differentiation and exhibits moderate antioxidant activity in the 2,2-diphenyl-1-picrylhydrazyl free radical scavenging assay.

3′-O-Methylorobol, a natural product isolated and purified from the herbs of Kadsura interior, can increase osteoblast differentiation and exhibits moderate antioxidant activity in the 2,2-diphenyl-1-picrylhydrazyl free radical scavenging assay.

3′,4′,5′,3,5,6,7-Heptamethoxyflavone is a natural product isolated and purified from the peel of Citrus sinensis.

3′,4′,5′,3,5,7,8-Heptamethoxyflavone is a natural product isolated and purified from the leaves of Murraya exotica L.

3-Methyltoxoflavin is a potent Protein disulfide isomerase (PDI) inhibitor, with an IC50 of 170 nM.

3-Methyltoxoflavin is a potent Protein disulfide isomerase (PDI) inhibitor, with an IC50 of 170 nM.