Eupteleasaponin I is a natural product from Euptelea polyandra Sieb. et Zucc.

4-Methylumbelliferyl-α-D-Glucopyranoside (4-Methylumbelliferyl-α-D-Glucose) is a fluorescent substrate for α-glucosidase, which releases the fluorescent moiety 4-methylumbelliferyl (4-MU) upon cleavage. 4-MU has pH-dependent fluorescence excitation activity, with excitation wavelengths of 320 nm at low pH (1.97-6.72) and 360 nm at high pH (7.12-10.3), respectively.

PTP Inhibitor I 是一种细胞渗透性蛋白酪氨酸磷酸酶 (PTP) 抑制剂，可共价阻断包含 Src 同源区 2 结构域的磷酸酶 (SHP-1(ΔSH2)) 的催化结构域，Ki 值为 43 μM 和 PTP1B Ki 值为 42 μM。