methymin c Secrets
S? d?ng cho ng??i b?nh b? ung th? ?ang ?i?u tr? b?ng hóa ch?t ho?c phóng x?.
Equally as the acid strength of a carboxylic acid may be calculated by defining an acidity constant Ka (Segment two-eight), The bottom toughness of an amine is usually measured by defining an analogous