Isocarboxazid is a non-selective and irreversible inhibitor of monoamine oxidase, with an IC50 of 4.8 μM for rat brain monoamine oxidase in vitro.

Isoastragaloside IV is a triterpene oligoglycoside isolated from Astragali Radix.

ISO-92 is a potent inhibitor of macrophage migration inhibitory factor (MIF) tautomerase activity with IC50 of 0.55 uM..

ISO-66 is a novel, highly stable, small-molecule MIF inhibitor that inhibits MIF tautomerase activity with IC50 of 1.4 uM.

Isepamicin

Isavuconazonium is a water-soluble prodrug form of the azole antifungal isavuconazole (ISA).

Isavuconazole(BAL-4815; RO-0094815) is the active component of the new azole antifungal agent BAL8557, exhibits MIC(50)s/MIC(90)s ranged from 0.002/0.004 mg/liter for C. albicans to 0.25/0.5 mg/liter for C. glabrata.

Isatoribine is a selective agonist of TLR7

Isatin is an endogenous MAO inhibitor.

ISA27 is a novel small molecule that blocks p53-MDM2 interaction and induces apoptosis both in vitro and in vivo.

ISA-2011B is a PIP5Kα inhibitor with promising anticancer effects .

IS-741 (Fuzapladib, IS741) is a synthetic anti-inflammatory agent that shows inhibitory effect on cytosolic phospholipase A2 (cPLA2)..

Irsogladine maleate is a selective PDE4 inhibitor that facilitates gap junction intercellular communication through muscarinic acetylcholine receptor binding. It is a potent inhibitor of angiogenesis in wild-type and plasminogen activator-deficient mice.

IRE1α-IN-3 is a novel, potent IRE1α RNase inhibitor with EC50 of 0.82 uM.

Irdabisant (CEP-26401) is a potent, selective, orally active histamine H3 receptor antagonist with Ki of 2 nM and 7 nM for human and rat H3Rs, respectivity.

Irdabisant (CEP-26401) is a potent, selective, orally active histamine H3 receptor antagonist with Ki of 2 nM and 7 nM for human and rat H3Rs, respectivity.

Irampanel (BIIR 561) is a combined antagonist of AMPA receptors (AMPAR) and voltage-dependent sodium channels.

Irampanel (BIIR 561) is a combined antagonist of AMPA receptors (AMPAR) and voltage-dependent sodium channels.

IRAK inhibitor 6 is interleukin-1 receptor associated kinase 4 (IRAK-4) inhibitor .

IRAK inhibitor 2 is interleukin-1 receptor associated kinase inhibitor .

IR415 is a novel small molecule inhibitor of HBV virus replication that blocks hepatitis B virus X protein (HBx, Kd=2 nM) mediated RNAi suppression, reverses the inhibitory effect of HBx protein on activity of the Dicer endoribonuclease.

IQM-266 (IQM266) is a DREAM (Downstream Regulatory Element Antagonist Modulator) ligand (Kd=4.63 uM), inhibits the KV4.3/DREAM current in a concentration-, voltage-, and time-dependent-manner.

Ipratropium bromide

Ipidacrine hydrochloride is a reversible acetylcholinesterase (AChE) inhibitor that directly stimulates impulse transmission in the central nervous system and neuromuscular synapses by blocking membrane potassium channels.

Ipidacrine hydrochloride hydrate is a reversible acetylcholinesterase (AChE) inhibitor that directly stimulates impulse transmission in the central nervous system and neuromuscular synapses by blocking membrane potassium channels.

IPI-9119 (IPI9119) is a potent, selective, and irreversible inhibitor of fatty acid synthase (FASN) with IC50 of 0.3 nM in biochemical assays.

IPA-3 is a selective non-ATP competitive PAK1 inhibitor with IC50 of 2.5 μM, no inhibition to group II PAKs (PAKs 4-6).

iOWH032 is a novel and potent CFTR inhibitor (IC50=1.01 uM) in T84 and CHO-CFTR cell based assays.

Iopamidol is a nonionic, low-osmolar iodinated contrast agent.

Ionomycin is an ionophore produced by the bacterium Streptomyces conglobatus.