“…After heating, the solution was cooled to room temperature, then cold water (10 mL) was added. The precipitate was filtered, dried, and recrystallized to give 5a-t. 8, 14.2, 27.9, 109.3, 115.3, 127.1, 128.8, 129.5, 138.4, 149.6, 157.2, 157.5, 160.8, 171.8 8,66.6,108.9,115.4,127.2,128.9,129.6,138.2,149.5,157.1,157.7,161.9,165.2 ppm. Anal.…”