As representative examples, we selected three molecules: isomeric acids 37, 43, and amine 41. All compounds were crystalline white solids. They were air-stable and moisture-stable. We stored them at room temperature in closed vials on the shelf for one year and observed no decomposition according to 1 H NMR. Under heating at 100 °C for five minutes, all compounds remained stable. Treatment of compounds with aq. 1M hydrochloric acid, or aq. 1M sodium hydroxide at room temperature for one hour and the subsequent control by 1 H NMR showed no decomposition either.