Desmethyl Ranolazine; N-(2,6-Dimethylphenyl)-4-[2-hydroxy-3-(2-hydroxyphenoxy)propyl]-1-piperazineacetamide; N-(2,6-Dimethylphenyl)-2-(4-(2-hydroxy-3-(2-hydroxyphenoxy)propyl)piperazin-1-yl)acetamide