1,3,4-trimethyl-2,5-dihydro-1λ⁵-phosphole 1-oxide

1,3,4-trimethyl-2,3-dihydro-1H-phosphole 1-oxide

tetraethoxy(phenyl)-λ⁵-phosphane

三丁基锡乙氧化物

λ¹-oxidanylethane