1,2,3,4-Butanetetrol, (R*,S*)- 1,2,3,4-Tetrahydroxybutane 149-32-6 Butanetetrol ERYTHRITOL Erythrit Erythritol, meso- Erythrol NSC8099 Phycitol WLN: Q1YQYQ1Q meso-Erythritol