1. Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
2. Department of Computer Science, University of Toronto, 40 St. George Street, Toronto, Ontario M5S 2E4, Canada
3. IBM Research Zürich, Rüschlikon, Zürich 8803, Switzerland
4. Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College St., Toronto, Ontario M5S 3E5, Canada
5. Department of Materials Science and Engineering, University of Toronto, 184 College St., Toronto, Ontario M5S 3E4, Canada
6. CIFAR Artificial Intelligence Research Chair, Vector Institute, Toronto, Ontario M5S 1M1, Canada