2,2-Diphenylpropanoic acid 3-quinuclidinyl ester 3-Qdpp 3-Quinuclidinyl 2,2-diphenylpropanoate 3818-79-9 4775-90-0 Aprolidine Benzeneacetic acid, alpha-methyl-alpha-phenyl-, 1-azabicyclo(2.2.2)oct-3-yl ester