纯度大于95%，核磁无明显杂峰

(S)-3-((4-hydroxybenzamido)methyl)-5-methylhexanoic acid

C15H21NO4

Exact Mass: 279.15

Mol. Wt.: 279.33 m/e: 279.15 (100.0%), 280.15 (17.2%), 281.15 (2.2%)

C, 64.50; H, 7.58; N, 5.01; O, 22.91