A.H.
Mix equal parts of liquid detergent and powdered bleach and work it into the stain and let sit over night, then add to 1 gallon of cool water 1/2 cup of liquid detergent and 1/2 cup of powdered bleach and let soak over night, then launder the garment in cool water and regular amounts of detergent and powdered bleach. This always works for me, it gets even Chocolate out of whites. Good luck.