Sigma-Aldrich
Niobium
铌
Polyamide-Nylon 11
Vanillin
香草醛
(+)-1,2-Bis[(2R,5R)-2,5-diethylphospholano]ethane
(+)-1,2-双[(2R,5R)-2,5-二乙基膦烷基]乙烷