甲醇

(1R,4S,5R,8S)-4,8-dibromo-6-oxabicyclo[3.2.1]oct-2-en-7-one

4-肼基苯甲酸

对溴苯胺

(3R,4R)-4-amino-3-((1-carboxyvinyl)oxy)cyclohexa-1,5-diene-1-carboxylic acid compound with 2,2,2-trifluoroacetic acid (1:1)