4methylumbelliferylαliduronide (free acid)

4-Methylumbelliferyl-α-L-Iduronide 是 α-L-艾杜糖醛酸酶催化活性常用底物。

Latanoprost is an F-series prostaglandin (PG) analog which has been approved for use as an ocular hypotensive drug. Latanoprost is an isopropyl ester, a prodrug form which is converted to latanoprost (free acid) by endogenous esterase enzymes. The free acid form is 200 times more potent than latanoprost as a ligand for the human recombinant FP receptor. 5-trans Latanoprost (free acid) is an isomer of latanoprost (free acid) wherein the double bond between carbons 5 and 6 has been changed from cis (Z) to trans (E). The trans isomer of latanoprost occurs as an impurity in commercial preparations of the bulk drug product. The present compound was prepared primarily as an analytical standard for detection and quantitation of this impurity. From what can be inferred from the study of other trans isomers of F-type prostaglandins, the biological activity of this isomer is likely to be similar to that of the cis isomer. However, there are no specific published reports on the biological activity, and on reducing intraocular pressure in particular, of 5-trans latanoprost.

15-keto Latanoprost is a potential metabolite of latanoprost when administered to animals. 15-keto Latanoprost is also one of the common minor impurities found in commercial preparations of the bulk drug compound. Although much less potent that the parent compound latanoprost, 15-keto latanoprost still retains the ability to produce a small but measurable decrease (1 mm Hg) in the intraocular pressure of normal cynomolgus monkeys when administered at a dose of 1 μg/eye. 15-keto Latanoprost is also a miotic in the normal cat eye, causing an 8 mm Hg reduction in pupillary diameter at 5 μg/eye. Again, this is not as potent as many other F-type prostaglandins; for example, prostaglandin F2α will produce this degree of miosis at a dose of less than 1 μg/eye.

Cefpodoxime (free acid) 是一种口服的第三代头孢菌素抗生素。除铜绿假单胞菌、肠球菌和脆弱拟杆菌外，它对大多数革兰氏阳性和革兰氏阴性微生物均有效。

IQ-1S free acid (IQ-1S) 是 NF-κB/激活蛋白1 (AP-1) 抑制剂(IC50:2.3±0.41 μM)。它对 JNK1(Kd:240 nM)、JNK2(Kd:360 nM) 和 JNK3(Kd:100 nM)的都具有高的结合亲和力 。

Dianemycin (Nanchangmycin (free acid)) 由Streptomyces nanchangensis 产生的一种聚醚抗生素，抑制革兰氏阳性菌。它也是一种针对 Zika 病毒的广谱抗病毒药物。