Isotanshinone IIA, could non-competitively inhibit Protein Tyrosine Phosphatase 1B (PTP1B) activity with an IC50 0f 11.4 μM. is an abietane-type diterpene metabolite.

Microcystin-LR (Cyanoginosin-LR) 是一种蛋白磷酸酶 1 型和 2A 型的有效抑制剂，其 IC50值分别为 1.7 nM，0.04 nM。

Microcystin-RR (Cyanoviridin RR)，一种有效的口服活性蛋白磷酸酶抑制剂，能诱导细胞凋亡和小鼠肝脏内质网应激。

SHP2-IN-6 hydrochloride is a highly potent inhibitor of SHP2 with an IC50 of 25.8 nM.

A12B4C3 is a selective inhibitor of hPNKP phosphatase.

ABL127 is a selective and covalent inhibitor of protein methylesterase 1 (PME-1). In HEK293T and MDA-MB-231 cells, the IC50s values are 6.4 nM and 4.2 nM , respectively.

NAZ2329 是受体型蛋白质酪氨酸磷酸酶 (RPTPs) R5 亚家族的一个细胞可渗透抑制剂，与其他 PTPs 相比，其变构且能够优先抑制 PTPRZ (hPTPRZ1 的IC50= 7.5 μM) 和PTPRG (hPTPRGIC50= 4.8 μM)。NAZ2329 能够与PTPRZ 的 D1结构域结合，与PTPRZ 整个 (D1 + D2) 片段相比，其能够更有效地抑制 PTPRZ1-D1片段 (IC50: 1.1 μM)。NAZ2329 能够抑制胶质母细胞瘤细胞的肿瘤生长，并表现出抑制干细胞样特性。

[pTyr5] EGFR (988-993) is a compound obtained from the auto-phosphorylation site, Tyr992, located within the sequence of the epidermal growth factor receptor (EGFR 988-993). This compound is frequently found bound with the catalytically inactive protein-tyrosine phosphate 1B (PTP1B).

L-690488 has more effective cell penetration than L-690330. L-690488 is a prodrug of L-690330 and is a selective inositol monophosphatase (IMPase) inhibitor.