“…There are three examples, II-IV, of derivatives with a hydroxy group in the 2-position of the ring connected to the imine-C atom (Madanhire et al, 2015;Sethuraman et al, 2002;Begum et al, 2016), with their chemical diagrams shown in Scheme 2. Interestingly, there are four virtually identical molecules comprising the asymmetric unit in IV (Begum et al, 2016).…”