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.

New compound 12 (Rhoifolin analog)

RGD-4C 是一种具有整合素结合活性的精氨酸-甘氨酸-天冬氨酸肽 (ACDCRGDCFC)。Arg-Gly-Asp (RGD) 序列是细胞外基质蛋白的主要整合素识别位点，含有该序列的多肽可以模拟基质蛋白的识别特异性。RGD-4C 是 αv 整合素配体，可与生物活性分子偶联，在动物模型中发挥抗肿瘤作用。