Is it forbidden to use the syrup of unripe green grapes if it has been boiled?

Fatwa, posted 4.22.2010, from Iraq, in:
Religious Authority: 
Ali al-Sistanti
Website URL: 
http://www.sistani.org/
Fatwa Question or Essay Title: 
Is it forbidden to use the syrup of unripe green grapes if it has been boiled?

No, it is not forbidden.

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