3-butyl-6,7-bis(2-hydroxyphenyl)-3-azabicyclo[3.2.0]heptane-2,4-dione

N,N'-dibutyl-c-3,c-4-bis(2-hydroxyphenyl)-r-1,c-2-cyclobutanedicarboxamide

3-carboxy-2-hydroxy-cinnamic acid

salicylaldehyde, sodium salt

水