5-Ethyl-6-methylthieno[2,3-d]pyrimidin-4(3H)-one

5-乙基-6-甲基噻吩并[2,3-d]嘧啶-4(3H)-酮

Also known as: 5-Ethyl-6-methyl-3H-thieno[2,3-d]pyrimidin-4-one, 5-Ethyl-6-methylthieno[2,3-d]pyrimidin-4-ol, Thieno[2,3-d]pyrimidin-4(1H)-one, 5-ethyl-6-methyl-, 5-ethyl-6-methyl-3H-thieno[2,3-d]pyrimidin-4-one

5-Ethyl-6-methylthieno[2,3-d]pyrimidin-4(3H)-one (CAS 439692-89-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H10N2OS and a molecular weight of 194.25300 g/mol. It is also known as 5-Ethyl-6-methyl-3H-thieno[2,3-d]pyrimidin-4-one, 5-Ethyl-6-methylthieno[2,3-d]pyrimidin-4-ol and Thieno[2,3-d]pyrimidin-4(1H)-one, 5-ethyl-6-methyl-. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 439692-89-4
Jingsj CID: J-1118864-9
Molecular Formula: C₉H₁₀N₂OS
Chinese Name: 5-乙基-6-甲基噻吩并[2,3-d]嘧啶-4(3H)-酮
Molecular Weight: 194.25300 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Frequently Asked Questions

What is the CAS number of 5-Ethyl-6-methylthieno[2,3-d]pyrimidin-4(3H)-one?

The CAS number of 5-Ethyl-6-methylthieno[2,3-d]pyrimidin-4(3H)-one is 439692-89-4.

What are the molecular formula and molecular weight of 5-Ethyl-6-methylthieno[2,3-d]pyrimidin-4(3H)-one?

5-Ethyl-6-methylthieno[2,3-d]pyrimidin-4(3H)-one has molecular formula C9H10N2OS and molecular weight 194.25300 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "5-Ethyl-6-methylthieno[2,3-d]pyrimidin-4(3H)-one (CAS 439692-89-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1118864-9 (accessed 2026-10-25).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.