| methylprednisolone hemisuccinate | <chemical> (6 alpha,11 beta)-21-(3-carboxy-1-oxopropoxy)-11,17-dihydroxy-6-methylpregna-1,4-diene-3,20-dione. A water-soluble ester of methylprednisolone used for cardiac, allergic, and hypoxic emergencies. Pharmacological action: steroidal anti-inflammatory agents, antineoplastic agent, hormonal, glucocorticoids, synthetic, glucocorticoids, topical, neuroprotective agents. Chemical name: Pregna-1,4-diene-3,20-dione, 21-(3-carboxy-1-oxopropoxy)-11,17-dihydroxy-6-methyl-, (6alpha,11beta)- (12 Dec 1998) |
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| methylrosaniline chloride | Hexamethylpararosanilin chloride;a compound that has been used in the external treatment of burns, wounds, and fungal infections of skin and mucous membranes, and internally for pinworm and certain fluke infections; used also as a stain for chromatin, amyloid, platelets in blood, fibrin, and neuroglia, and to differentiate among bacteria. Synonym: methylrosaniline chloride. (05 Mar 2000) |
| methyltestosterone | <chemical> 17 beta-hydroxy-17-methylandrost-4-en-3-one. Pharmacological action: anabolic steroids, androgens, synthetic, antineoplastic agent, hormonal. Chemical name: Androst-4-en-3-one, 17-hydroxy-17-methyl-, (17beta)- (12 Dec 1998) |
| methylthioadenosine | Adenosine carrying an -SCH3 group in place of OH at position 5'; the -SCH3 group is transferred to alpha-aminobutyric acid to form l-methionine in some bacteria. Methylthioadenosine is formed from S-adenosyl-l-methionine in the course of spermidine synthesis by loss of the alanine moiety. Synonym: thiomethyladenosine. (05 Mar 2000) |
| methylthioinosine | <chemical> 6-(methylthio)-9-beta-d-ribofuranosylpurine. An analog of inosine with a methylthio group replacing the hydroxyl group in the 6-position. Chemical name: Inosine, 6-S-methyl-6-thio- (12 Dec 1998) |
| methylthiolase | <enzyme> Catalyses the cleavage of the methylthio group from 5-methylthioribose-1-phosphate Chemical name: 5-methylthioribose-1-phosphate methylthiolase Registry number: EC 3.3.1.- (26 Jun 1999) |
| methylthiouracil | <chemical> A thiourea antithyroid agent that inhibits the synthesis of thyroid hormone. It is used in the treatment of hyperthyroidism. Pharmacological action: antithyroid agents. Chemical name: 4(1H)-Pyrimidinone, 2,3-dihydro-6-methyl-2-thioxo- (12 Dec 1998) |
| methyltocol | A methylated tocol; e.g., tocotrienol, the tocopherols. (05 Mar 2000) |
| methyltransferase | <enzyme> That transfers a methyl group from S adenosyl methionine to a substrate. most commonly encountered in bacterial chemotaxis where the methyl accepting chemotaxis proteins (MCPs) become methylated in the course of adaptation. (18 Nov 1997) |
| methyltransferases | <enzyme> A subclass of enzymes of the transferase class that catalyze the transfer of a methyl group from one compound to another. Registry number: EC 2.1.1. (12 Dec 1998) |
| methyltyrosines | A group of compounds that are methyl derivatives of the amino acid tyrosine. (12 Dec 1998) |
| methylumbelliferone sulfatase | <enzyme> Used as test substrate for arylsulfatases Registry number: EC 3.1.6.- Synonym: 4-methylumbelliferone sulfate sulfatase (26 Jun 1999) |
| methylurea compounds | Urea compounds which are substituted with one or more methyl groups. (12 Dec 1998) |
| methylxanthines | A chemical group of drugs derived from xanthine (a purine derivative); members of the group include theophylline, caffeine, and theobromine. (05 Mar 2000) |
| methyprylone | 3,3-Diethyl-2,4-dioxo-5-methylpiperidine;a sedative and hypnotic. (05 Mar 2000) |