It appears the manufacturer did not list the pigment(s) for this paint.
Terre Verde Brentonico Extra Pale is a chromatic mint green that leans blue. This color is much more chromatic than Vasari’s Terre Verde Ancienne Extra Pale, which is more of a grey. Terre Verde Brentonico Extra Pale is not a chromatic pastel such as what Gamblin carries, as there is still the mild desaturation to the mint. There is a blue note to the mint as well.
This color is part of the set called The Renaissance Touch of Color. Here is what Vasari says about the set, as their brand statements here may shed more light on this individual color as an opaque pigment blend. “Uniquely formulated from the delicate transparent and semi-transparent natural earth pigments actually used by the Renaissance Masters of painting, this set of eight opaque tints offers subtle notes of light. Useful as whites for delicate changes of value or as neutrals to modify brighter colors for suggestions of space and time.
The eight extra pale colors in the set offer a range of warm or cool, exquisite color, and soft neutral tones.” -Vasari