(3S,4R)-3,4-dihydroxy-L-isoleucine residue
(3s,4r)-3,4-dihydroxy-l-isoleucine residue
An <small>L</small>-isoleucine residue that is substituted by hydroxy groups at positions 3 and 4 (the 3<i>S</i>,4<i>R</i> diastereoisomer).