TLH *two asymmetric center de Plane of symmetry Achival (Meso) a n La chiral 5th * 2-3 CH₃ 4 Achiral (me n a chiral 52. CH3 CH3 Ha 44 chiral CH₂ Chiral Achiral (ш ) CH3 chiral CH(CH3)2 53 HXX ya - Nytu OH HOH n taa viral a OH cm3 → Chiral a bach; chiral он Achiral - TH (Meso) Lon - Chiral. TH Oh