Do you know stevia liquid 25%?

No, but . . . Stevia liquid 25% sounds like it is part stevia and part other things. Stevia is a sweetener made from the sweet species stevia rebaudiana. It is much sweeter than sugar, and does not add calories or carbohydrates to the food. Stevia is considered quite safe to use, but as with any non-regulated dietary supplement, dose/purity/side-effects/etc... May vary between brands and batches of product.
No. Not sure what this is and i therefore do not suggest it's use.