for the following products
(1S,2R)-1-[[(1,1-Dimethylethoxy)carbonyl]amino]-2-ethenyl-cyclopropanecarboxylic acid | 1-[[(1,1-Dimethylethoxy)carbonyl]amino]-2-ethenyl-,(1S,2R)- and (1S,2R)-1-(tert-Butoxycarbonylamino)-2-vinyl-cyclopropanecarboxylic acid
