disubstituted thiourea二取代硫脲
Disubstituted polyacetylenes双取代聚乙炔
disubstituted piperazine双取代哌嗪
4 disubstituted二取代
disubstituted urea二取代脲
disubstituted tetrahydrofurans二取代四氢呋喃
disubstituted derivatives二取代衍生物
disubstituted semicarbazide二取代氨基脲