Acetomepregenol (ACM), also known as mepregenol diacetate and sold under the brand name Diamol, is a progestin medication which is used in Russia for the treatment of gynecological conditions and as a method of birth control in combination with an estrogen.[1][2][3][4][5][6][7] It has also been studied in the treatment of threatened abortion.[3] It has been used in veterinary medicine as well.[8][9][10] It has been marketed since at least 1981.[8][9][10]
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| Trade names | Diamol |
| Other names | ACM; Mepregenol diacetate; Diamol; Megestrol diacetate; Megestrol 3β,17α-diacetate; 3β,17α-Diacetoxy-6-methylpregna-4,6-dien-20-one; 6-Methylpregna-4,6-dien-3β,17α-diol-20-one diacetate |
| Drug class | Progestogen; Progestin; Progestogen ester |
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| Formula | C26H36O5 |
| Molar mass | 428.569 g·mol−1 |
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Pharmacology
Based on its chemical structure, namely the lack of a C3 ketone, it is probable that acetomepregenol is a prodrug of megestrol acetate (the 3-keto analogue).[11][12]
Chemistry
Acetomepregenol, also known as megestrol 3β,17α-diacetate, as well as 3β-dihydro-6-dehydro-6-methyl-17α-hydroxyprogesterone diacetate or as 3β,17α-diacetoxy-6-methylpregna-4,6-dien-20-one, is a synthetic pregnane steroid and a derivative of progesterone and 17α-hydroxyprogesterone.[3][4][7] It is very close to megestrol acetate (6-dehydro-6-methyl-17α-acetoxyprogesterone) in structure, except that there is a hydroxyl group with an acetate ester attached at the C3 position instead of a ketone.[3][4][7] A closely related medication is cymegesolate (also known as megestrol 3β-cypionate 17α-acetate), which, in contrast, has not been marketed.[13][14]