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AL H (1) tou H a) Provide the structure at all siseoisomers stating f they are optically active or not. Determine the absolut configurata ion of all chiral centers for those stereoisomers you found. and which are enantiomers or diostereomers, when applicable. b) write 3D representation for compounds explain by following the cash - I Ingold Preloj rules. (28- 384, con .CH NH CH Br R enantioner of