Imidodicarbonic acid, [2-(2-formyl-3-hydroxy-4-methoxyphenyl)ethyl]-,1,1-dimethylethyl phenylmethyl ester

4-(2-N-carbobenzoxy-N-carbo-tert-butoxyaminoethyl)-7-methoxy-2-methylbenzo(b)furan

Imidodicarbonic acid, [2-(2-formyl-3,4-dimethoxyphenyl)ethyl]-,1,1-dimethylethyl phenylmethyl ester

4-(2-N-carbobenzoxy-N-carbo-tert-butoxyaminoethyl)-2,3-dihydroxy-7-methoxy-2-methyl-2,3-dihydrobenzo(b)furan