12320-51-3 29868-86-8 4-Thiazolidinone, 5-acetyl-2-(dibutylamino)-3-phenyl-, meso-ionic didehydro deriv. 5-Acetyl-2-(dibutylamino)-3-phenyl-4-thiazolidinone meso-ionic didehydro deriv. Thiazolium, 5-acetyl-2-(dibutylamino)-4-hydroxy-3-phenyl-, hydroxide, inner salt (8CI)