tert-Butyl 7-(2-(2,8-dimethylimidazo[1,2-b]pyridazin-6-yl)-4-oxo-4H-pyrido[1,2-a]pyrimidin-7-yl)-4,7-diazaspiro[2.5]octane-4-carboxylate

7-(2-(2,8-二甲基咪唑并[1,2-b]哒嗪-6-基)-4-氧代-4H-吡啶并[1,2-a]嘧啶-7-基)-4,7-二氮杂螺[2.5]辛烷-4-羧酸叔丁酯

Also known as: 4,7-Diazaspiro[2.5]octane-4-carboxylic acid, 7-[2-(2,8-dimethylimidazo[1,2-b]pyridazin-6-yl)-4-oxo-4H-pyrido[1,2-a]pyrimidin-7-yl]-, 1,1-dimethylethyl ester, 1,1-Dimethylethyl 7-[2-(2,8-dimethylimidazo[1,2-b]pyridazin-6-yl)-4-oxo-4H-pyrido[1,2-a]pyrimidin-7-yl]-4,7-diazaspiro[2.5]octane-4-carboxylate, Risdiplam Impurity 17, Risdiplam Impurity 21

tert-Butyl 7-(2-(2,8-dimethylimidazo[1,2-b]pyridazin-6-yl)-4-oxo-4H-pyrido[1,2-a]pyrimidin-7-yl)-4,7-diazaspiro[2.5]octane-4-carboxylate (CAS 2133298-74-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C27H31N7O3 and a molecular weight of 501.6 g/mol. It is also known as 4,7-Diazaspiro[2.5]octane-4-carboxylic acid, 7-[2-(2,8-dimethylimidazo[1,2-b]pyridazin-6-yl)-4-oxo-4H-pyrido[1,2-a]pyrimidin-7-yl]-, 1,1-dimethylethyl ester, 1,1-Dimethylethyl 7-[2-(2,8-dimethylimidazo[1,2-b]pyridazin-6-yl)-4-oxo-4H-pyrido[1,2-a]pyrimidin-7-yl]-4,7-diazaspiro[2.5]octane-4-carboxylate and Risdiplam Impurity 17. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

2133298-74-3

Jingsj CID

J-1238419-8

Molecular Formula

C₂₇H₃₁N₇O₃

Chinese Name

7-(2-(2,8-二甲基咪唑并[1,2-b]哒嗪-6-基)-4-氧代-4H-吡啶并[1,2-a]嘧啶-7-基)-4,7-二氮杂螺[2.5]辛烷-4-羧酸叔丁酯

Molecular Weight

501.6 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026