“…Computer-Assisted Organic Synthesis (COMPASS) was developed based on the combination of pure combinatorial methods with empirical rules of retro-synthetic analysis [69]. The CAESA approach included an opportunistic synthetic analysis of all the compounds in the starting materials databases, which is only performed once and stored in a relational database of virtual starting materials [70]. A computational program to predict organic reactions, ROBIA, performs reaction prediction on the basis of coded rules and molecular modelling calculations, generating possible TS, intermediates and Fig.…”