HG/T 5845～5848-2021
N-ethyl para-ester [4-N-ethylaminophenyl (β-hydroxyethyl sulfone sulfate)], N-ethyl meta-ester [3-N-ethylaminophenyl (β-ethyl sulfone], acetylated amino oil [4-amino-N-[3-(ethylhydroxyethyl)sulfone]phenylbenzamide] and 2,4-dimethylacetoacetanilide (2021) (English Version)