计算溶液所需的质量、体积或浓度。
,适用于对基线干扰要求严格的色谱和分析工作流程。
-80℃储存。特低温运输 。请查阅批次 COA 获取详细规格。
SDS、COA、产品数据表及规格说明书均可下载。可通过批号查询获取批次 COA。
在色谱分析、有机合成和交叉偶联反应领域已被 1 篇同行评审文献引用。
(S)-Timolol Maleate (L-714,465 Maleate) 是一种非心脏选择性的亲水性 β-肾上腺素受体 (β-adrenoceptor) 阻滞剂。(S)-Timolol Maleate 通过防止房水的产生而被广泛用作眼压(青光眼)的标准药物。(S)-Timolol Maleate 可用于高血压,心绞痛和心肌梗塞的研究。
Information
Timolol Maleate (MK-950) is a non-selective,beta-adrenergic receptorantagonist forβ1/β2withKiof 1.97 nM/2.0 nM.
In vitro
Timolol Maleate is a beta-adrenergic antagonist similar in action to propranolol. The levo-isomer is the more active. Timolol has been proposed as an antihypertensive, antiarrhythmic, antiangina, and antiglaucoma agent. Similar to propranolol and nadolol, timolol is a non-selective, beta-adrenergic receptor antagonist. Timolol has a higher affinity for the beta 2-adrenoceptor than for the beta 1-adrenoceptor in human atrium. Timolol does not have significant intrinsic sympathomimetic, direct myocardial depressant, or local anesthetic (membrane-stabilizing) activity, but does possess a relatively high degree of lipid solubility. Timolol, when applied topically to the eye, has the action of reducing elevated, as well as normal, intraocular pressure, whether or not accompanied by glaucoma. Elevated intraocular pressure is a major risk factor in the pathogenesis of glaucomatous visual field loss and optic nerve damage. Like propranolol and nadolol, timolol competes with adrenergic neurotransmitters such as catecholamines for binding at β1-adrenergic receptors in the heart and vascular smooth muscle and β2-receptors in the bronchial and vascular smooth muscle. β1-receptor blockade results in a decrease in resting and exercise heart rate and cardiac output, a decrease in both systolic and diastolic blood pressure, and, possibly, a reduction in reflex orthostatic hypotension. β2-blockade results in an increase in peripheral vascular resistance. The exact mechanism whereby timolol reduces ocular pressure is still not known. The most likely action is by decreasing the secretion of aqueous humor.
In vivo
Cell Data
cell lines:
Concentrations:
Incubation Time:
Powder Purity:≥97%
H302: 吞食有害
H372: 通过长时间或反复暴露对器官造成损害
H361: 怀疑破坏生育力或未出生的孩子
P280: 戴防护手套/穿防护服/戴防护眼罩/戴防护面具。
P405: 密闭存放
P501: 将内容物/容器处理到。。。
P264: 处理后要彻底洗手。
P260: 不要吸入灰尘/烟雾/气体/雾/蒸汽/喷雾。
P270: 使用本产品时,请勿进食、饮水或吸烟。
P330: 漱口
P203: 使用前,获取、阅读并遵守所有安全说明。
P301+P317: 如果被吞咽:请寻求医疗帮助。
P318: 如果暴露或担心,请就医。
P319: 如果你感到不适,请寻求医疗帮助。