Swiss agrochemicals maker Syngenta's logo is seen in front of the headquarters in Basel February 4, 2015. REUTERS/Arnd Wiegmann

(Reuters) - State-owned China National Chemical Corp [CNNCC.UL] has raised its offer to buy Syngenta AG SYNN.VX by about $2 billion, to $44 billion, proposing a two-stage takeover of the agrochemical company, Bloomberg reported, citing sources.

ChemChina has offered 470 Swiss francs ($472) per share to buy 70 percent of Syngenta with an option to acquire the remaining 30 percent at a later date, Bloomberg said on Friday. (bloom.bg/1OdJSqo)

Syngenta and ChemChina were not immediately available for comment.

Syngenta, under pressure to boost shareholder returns after turning down a $47 billion takeover offer from Monsanto Co MON.N this year, rejected ChemChina's previous offer last month due to regulatory concerns, Bloomberg had reported.

The framework of the new offer allows ChemChina to integrate with Syngenta’s businesses before taking over complete control of the company, Bloomberg said.

Syngenta is ready to discuss deals with anyone in the industry, including Monsanto, interim Chief Executive John Ramsay told Dow Jones earlier on Friday.

Ramsay said Monsanto had not revived its takeover effort, but said a deal with ChemChina would face lower regulatory hurdles than a deal with a Western rival.