Spectinomycin dihydrochloride pentahydrate (Trobicin) is a widely used antibiotic that inhibits bacterial protein synthesis by blocking translocation of messenger RNA and transfer RNAs on the ribosome.

Spermidine (4-Azaoctamethylenediamine), a natural polyamine produced from putrescine and decarboxylated S-adenosylmethionine (dcSAM) by spermidine synthase, is a novel autophagy inducer and negatively modulates N-methyl-d-aspartate (NMDA).

Spermidine (4-Azaoctamethylenediamine), a natural polyamine produced from putrescine and decarboxylated S-adenosylmethionine (dcSAM) by spermidine synthase, is a novel autophagy inducer and negatively modulates N-methyl-d-aspartate (NMDA).

Spermine (4,9-Diaza-1,12-dodecanediamine) is a polyamine involved in cellular metabolism found in all eukaryotic cells. It is found in a wide variety of organisms and tissues and is an essential growth factor in some bacteria.

Spermine (4,9-Diaza-1,12-dodecanediamine) is a polyamine involved in cellular metabolism found in all eukaryotic cells. It is found in a wide variety of organisms and tissues and is an essential growth factor in some bacteria.

Spermine (Gerontine, Neuridine, Musculamine) is a polyamine involved in cellular metabolism found in all eukaryotic cells. It is a major natural intracellular compound capable of protecting DNA from free radical attack.

Sphingosine (2-amino-4-trans-octadecene-1,3-diol, C18 Sphingosine) is an 18-carbon amino alcohol with an unsaturated hydrocarbon chain, which forms a primary part of sphingolipids, a class of cell membrane lipids that include sphingomyelin, an important phospholipid.

Sphingosine (2-amino-4-trans-octadecene-1,3-diol, C18 Sphingosine) is an 18-carbon amino alcohol with an unsaturated hydrocarbon chain, which forms a primary part of sphingolipids, a class of cell membrane lipids that include sphingomyelin, an important phospholipid.

SPHINX31 is a SRPK1 inhibiror with an IC50 of 5.9 nM with highly selectivity for SRPK1 over SRPK2 (50-fold) and CLK1 (100-fold).

SPHINX31 is a SRPK1 inhibiror with an IC50 of 5.9 nM with highly selectivity for SRPK1 over SRPK2 (50-fold) and CLK1 (100-fold).

SPI-112 is a not cell permeable inhibitor of Src homology region 2 domain-containing phosphatase 2 (SHP-2, PTPN11) with IC50 of 1 μM in cell-free assay.

Spiculisporic acid (4,5-dicarboxy-4-pentadecanolide) is a bioactive γ-butenolide isolated from a marine Aspergillus.

Spinosin (Flavoayamenin), a flavone-C-glycoside, is a bioactive ingredient isolated from a traditional Chinese herb Zizyphi Spinosi Semen. It acts as a plant metabolite and an anxiolytic drug.

Spiramycin (Formacidine) is a 16-membered ring macrolide (antibiotic).

Spiramycin I (Foromacidin A) is a main component of spiramycin, which is a macrolide antimicrobial agent with broad spectrum antibiotic activity.

Spironolactone is a potent antagonist of the androgen receptor with IC50 of 77 nM.

Splitomicin is a selective NAD(+)-dependent histone deacetylase Sir2p inhibitor with IC50 of 60 μM, showing a higher activity in a cell-based assay.

SQ109 is a potent inhibitor of the trypomastigote form of the parasite, with IC50 for LLC-MK2 culture-derived trypomastigotes of 50±8 nM, targets MmpL3 (mycobacterial membrane protein large 3) in Mycobacterium tuberculosis.

SQ22536 (9-(tetrahydrofuran-2-yl)-9h-purin-6-amine) is an inhibitor of adenylyl cyclase with an IC50 of 1.4 μM. It can inhibit PGE1-stimulated increases in cAMP levels in intact human platelets.

SQ22536 (9-(tetrahydrofuran-2-yl)-9h-purin-6-amine) is an inhibitor of adenylyl cyclase with an IC50 of 1.4 μM. It can inhibit PGE1-stimulated increases in cAMP levels in intact human platelets.

SQ22536 (9-(tetrahydrofuran-2-yl)-9h-purin-6-amine) is an inhibitor of adenylyl cyclase with an IC50 of 1.4 μM. It can inhibit PGE1-stimulated increases in cAMP levels in intact human platelets.

SQ22536 (9-(tetrahydrofuran-2-yl)-9h-purin-6-amine) is an inhibitor of adenylyl cyclase with an IC50 of 1.4 μM. It can inhibit PGE1-stimulated increases in cAMP levels in intact human platelets.

Squalane (Perhydrosqualene, Dodecahydrosqualene) is a naturally occuring lipid in both plants and animals. It is usually used as an emollient and moisturizer in cosmetics manufacturing.

Squalene (Spinacene, Supraene, trans-Squalene), a naturally occurring substance found in plants, animals and humans, is a component of some adjuvants that is added to vaccines to enhance the immune response.

Squalene (Spinacene, Supraene, trans-Squalene), a naturally occurring substance found in plants, animals and humans, is a component of some adjuvants that is added to vaccines to enhance the immune response.

SR 0987, a SR 1078 analog, is an agonist for T cell-specific RORγ (RORγt) with EC50 of 800 nM. SR 0987 represses PD-1, produces IL17 and is potential for the treatment of cancer.