(4R,12aS)-3,4,6,8,12,12a-Hexahydro-4-methyl-6,8-dioxo-7-(phenylmethoxy)-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid

(4R,12aS)-7-苄氧基-4-甲基-6,8-二氧代-3,4,6,8,12,12a-六氢-2H-吡啶并[1',2':4,5]吡嗪并[2,1-b][1,3]恶嗪-9-羧酸

Also known as: (4R,12aS)-7-(Benzyloxy)-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid, Baloxavir marboxil intermediate, Baloxavir acid intermediate

(4R,12aS)-3,4,6,8,12,12a-Hexahydro-4-methyl-6,8-dioxo-7-(phenylmethoxy)-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid (CAS 1339879-91-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C20H20N2O6 and a molecular weight of 384.38 g/mol. It is also known as (4R,12aS)-7-(Benzyloxy)-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid, Baloxavir marboxil intermediate and Baloxavir acid intermediate. Key property: a density of 1.45±0.1 g/cm3 (20 ºC 760 Torr). No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
1339879-91-2
Jingsj CID
J-1189629-6
Molecular Formula
C20H20N2O6
Chinese Name
(4R,12aS)-7-苄氧基-4-甲基-6,8-二氧代-3,4,6,8,12,12a-六氢-2H-吡啶并[1',2':4,5]吡嗪并[2,1-b][1,3]恶嗪-9-羧酸
Molecular Weight
384.38 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Density1.45±0.1 g/cm3 (20 ºC 760 Torr)

Frequently Asked Questions

What is the CAS number of (4R,12aS)-3,4,6,8,12,12a-Hexahydro-4-methyl-6,8-dioxo-7-(phenylmethoxy)-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid?

The CAS number of (4R,12aS)-3,4,6,8,12,12a-Hexahydro-4-methyl-6,8-dioxo-7-(phenylmethoxy)-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid is 1339879-91-2.

What are the molecular formula and molecular weight of (4R,12aS)-3,4,6,8,12,12a-Hexahydro-4-methyl-6,8-dioxo-7-(phenylmethoxy)-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid?

(4R,12aS)-3,4,6,8,12,12a-Hexahydro-4-methyl-6,8-dioxo-7-(phenylmethoxy)-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid has molecular formula C20H20N2O6 and molecular weight 384.38 g/mol.

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

Last updated:

How to cite: Jingsj. "(4R,12aS)-3,4,6,8,12,12a-Hexahydro-4-methyl-6,8-dioxo-7-(phenylmethoxy)-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylic acid (CAS 1339879-91-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1189629-6 (accessed 2026-10-25).

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