3,3-Dimethyl-1-phenyl-1-phthalylacetic acid oxythiamine ester 99447-45-7 Dppaaoe Oxythiamine 3,3-dimethyl-1-phenyl-1-phthalylacetate Thiazolium, 5-(2-(((1,3-dihydro-3,3-dimethyl-1-phenyl-1-isobezofuranyl)acetyl)oxy)ethyl)-3-((1,4-dihydro-2-methyl-4-oxo-5-pyrimidinyl)methyl)-4-methyl-