C (5)-C (4)-N (14)(115.0, 114.5'), C (4)-N (14)-C (16)(115.3, 115.2'), C (4)-C (5)-C (18)(119.6, 119.2'), and C (4)-C (3)-C (13)(120.7, 120.5 O). There are more short intramolecular distances and presumably more strain in 2 than in 1. In 2, these short distances are between the methyl group and hydrogen atom on the ring and the methyl groups on the nitrogen atom.