The molecule is a 17-membered homodetic cyclic peptide comprising the sequence -Arg-Thr-Pro-Glu-Asp-Pro-Val-Val-His-Phe-Phe-Tyr-Asp-Ile-Val-Thr-Pro-. Cyclic analogue with head-to-tail cyclisation of the myelin basic protein 83-99 (MBP83-99) immunodominant epitope with the lysyl residue at position 91 replaced by tyrosyl [MBP83-99(Y(91))].
3-[(3S,6S,9S,15S,18S,21S,27S,30S,33S,36S,39S,42S,45S,48S,51S,54S,57S)-3,36-bis(2-amino-2-oxoethyl)-42,45-dibenzyl-33-butan-2-yl-18-(3-carbamimidamidopropyl)-15,27-bis(1-hydroxyethyl)-39-[(4-hydroxyphenyl)methyl]-48-(1H-imidazol-4-ylmethyl)-2,5,8,14,17,20,26,29,32,35,38,41,44,47,50,53,56-heptadecaoxo-30,51,54-tri(propan-2-yl)-1,4,7,13,16,19,25,28,31,34,37,40,43,46,49,52,55-heptadecazatetracyclo[55.3.0.09,13.021,25]hexacontan-6-yl]propanamide