CARBONIC ANHYDRASE ACTIVATORS. ACTIVATION OF ISOFORMS I, II, IV, VA, VII AND XIV WITH L- AND D- PHENYLALANINE AND CRYSTALLOGRAPHIC ANALYSIS OF THEIR ADDUCTS WITH ISOZYME II: STEROSPECIFIC RECOGNITION WITHIN THE ACTIVE SITE OF AN ENZYME AND ITS CONSEQUENCES FOR THE DRUG DESIGN, STRUCTURE WITH L-PHENYLALANINE