(3S,4S,5S)-N-tert-butoxycarbonyl-3,4-isopropylidenedioxy-5-allyl-2-pyrrolidinone

tert-butyl ((S)-1-((4S,5S)-5-(((S)-1-((S)-8-hydroxy-1-oxoisochroman-3-yl)-3-methylbutyl)carbamoyl)-2,2-dimethyl-1,3-dioxolan-4-yl)but-3-en-1-yl)carbamate

(4S,5S)-5-((S)-1-((tert-butoxycarbonyl)amino)but-3-en-1-yl)-2,2-dimethyl-1,3-dioxolane-4-carboxylic acid