“…two racemic diastereoisomers, if the 1,3-centers of chirality are different, and one meso (1,3-cis arrangement) and one racemic diastereoisomer (1,3-trans arrangement), if the 1,3-centers of chirality are the same. Crystallographic examples 96 [116], 97a-c [115] and 97d,e [117] are M a n u s c r i p t 32 shown below for 1,5-trans (racemic) form. There is only one crystal compound, 98, including also pseudoasymmetric center (discussed in Section 4.2), for 1,5-cis (meso) form.…”