1-Methyl-4-hydroxy-nipecotinsaeureaethylester [German] 1-Methyl-4-hydroxynipecotinic acid ethyl ester 3-Piperidinecarboxylic acid, 4-hydroxy-1-methyl-, ethyl ester 37673-66-8 4-22-00-02070 (Beilstein Handbook Reference) 4-Hydroxy-1-methyl-3-piperidinecarboxylic acid ethyl ester BRN 0138668