Methyldopa 555-30-6

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Molecular Weight: 211.21 Methyldopa (Aldomet) is a DOPA decarboxylase competitive inhibitor with an ED50 of 21.8 mg/kg.

Biological Activity

Methyldopa (Aldomet) is a DOPA decarboxylase competitive inhibitor with an ED50 of 21.8 mg/kg. It is also known as aromatic L-amino acid decarboxylase, which converts L-DOPA into dopamine. Dopamine is a precursor for norepinephrine (noradrenaline) and subsequently epinephrine (adrenaline). This inhibition results in reduced dopaminergic and adrenergic neurotransmission in the peripheral nervous system. The antihypertensive agents lofexidine (ED50, 0.03 mg/kg), guanabenz (ED50, 0.019 mg/kg), p-aminoclonidine (ED50, 0.23 mg/kg), methyldopa (ED50, 21.8 mg/kg), hydralazine (ED50, 0.98 mg/kg), prazosin (ED50, 0.72 mg/kg), minoxidil (ED50, 12.4 mg/kg) and pergolide (ED50, 0.021 mg/kg) were generalized to clonidine in a dose-dependent manner. Methyldopa (Aldomet) is a psychoactive molecule used as a sympatholytic or antihypertensive.o






Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)

Species	Baboon	Dog	Monkey	Rabbit	Guinea pig	Rat	Hamster	Mouse
Weight (kg)	12	10	3	1.8	0.4	0.15	0.08	0.02
Body Surface Area (m2)	0.6	0.5	0.24	0.15	0.05	0.025	0.02	0.007
Km factor	20	20	12	12	8	6	5	3

Animal A (mg/kg) = Animal B (mg/kg) multiplied by	Animal B Km
	Animal A Km

For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.

Rat dose (mg/kg) = mouse dose (22.4 mg/kg) ×	mouse Km(3)	= 11.2 mg/kg
	rat Km(6)

Chemical Information

Download Methyldopa SDF

Molecular Weight (MW)	211.21
Formula	C10H13NO4
CAS No.	555-30-6

Storage	3 years -20℃Powder
	6 months-80℃in solvent (DMSO, water, etc.)
Synonyms

Solubility (25°C) *	In vitro	DMSO	<1 mg/mL (
		Water	<1 mg/mL (
		Ethanol	<1 mg/mL (
* <1 mg/ml means slightly soluble or insoluble. * Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Name	3-hydroxy-α-methyl-L-tyrosine

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Product Categories : Neuronal Signaling > Adrenergic Receptor Inhibitor