Supphachok Chanmungkalakul attended the 23rd Tetrahedron Symposium conference at Göteborg, Sweden from 27th June to 30th June. This conference is for reporting and discussing the latest advances in organic chemistry, chemical biology, medicinal chemistry, and theoretical chemistry including computational chemistry. Supphachok had a poster presentation entitled “A Descriptor for Accurate Predictions of Host Molecules Enabling Ultralong Room-Temperature Phosphorescence in Guest Emitters”.