(+)-2-alpha-Tropan-2-ol, (+-)-2-cyclopentyl-2-(1-propynyl)glycolate 64471-26-7 BRN 1484501 Cyclopentaneglycolic acid, alpha-(1-propynyl)-, alpha-tropanyl ester L (+)-2-alpha-Tropanyl cyclopentyl(1-propynyl)glycolate