(S)-Indoximod (L-Abrine) 是一种吲哚胺-2,3-双加氧酶 (IDO) 抑制剂，可用于研究癌症。

BMS-986242 是具有口服具有活力、强效的、选择性的 indoleamine-2,3-dioxygenase 1 抑制剂，可用于研究癌症。

Kushenol E (Flemiphilippinin D) 是一种分离自Sophora flavescens 中的类黄酮，是一种IDO1的非竞争性抑制剂，其IC50=7.7 µM，Ki=为 9.5 µM，具有抗肿瘤特性。

IDO1/2-IN-1 hydrochloride 是一个有效的 IDO1 (IC50: 28 nM) 和 IDO2 (IC50: 144 nM) 双重抑制剂，口服具有活力。IDO1/2-IN-1 hydrochloride 表现出抗肿瘤作用。

IACS-8968 R-enantiomer is the R-enantiomer of IACS-8968. IACS-8968 is a dual IDO and TDO inhibitor (pIC50s: 6.43 for IDO and <5 for TDO).

BMT-297376, the optimized Linrodostat, is a potent IDO1 inhibitor.

(R)-IDO/TDO-IN-1 (化合物 25) 为一种具有优良药动学性质的吲哚胺-2,3-双加氧酶 (IDO) 抑制剂，在MC38异种移植模型中展现出抗肿瘤活性。该化合物还与抗PD-1单克隆抗体 (SHR-1210) 显示协同作用。

IDO1-IN-18 (Compound 14) 是一种 IDO1 的有效抑制剂。IDO1-IN-18 具有潜力进行癌症疾病的研究。

PROTAC IDO1 Degrader-1 is the first potent IDO1 (indoleamine 2,3-dioxygenase 1) degrader that hijacks IDO1 to CRBN E3 ligase to introduce IDO1 into UPS and eventually achieve ubiquitination and degradation (DC50=2.84 μM). PROTAC IDO1 Degrader-1 moderately improves the tumor-killing activity of H ER2 CAR-T cells[1]. PROTAC IDO1 Degrader-1 (compound 2c) (10 μM; 24 hours) notably decreases IDO1 level induced by IFN-γ[1].PROTAC IDO1 Degrader-1 and IFN-γ (5 ng/mL) are incubated with HeLa cells for 24 h, and a significant dose-dependent degradation is observed. PROTAC IDO1 Degrader-1 combined with chimeric antigen receptor-modified T (CAR-T) cells can improve the tumor-killing activity of HER-2 CAR-T cells[1].PROTAC IDO1 Degrader-1 induces significant and persistent degradation of IDO1 with maximum degradation (dmax) of 93% in HeLa cells[1]. [1]. Hu M, et al. Discovery of the first potent proteolysis targeting chimera (PROTAC) degrader of indoleamine 2,3-dioxygenase 1. Acta Pharm Sin B. 2020