1,1'-(氧基二-2,1-乙二基)二吡咯烷

3,5,3’,5’-四甲基-4,4’-二羟基联苯

5,3',5'-Trimethyl-3-pyrrolidin-1-ylmethyl-biphenyl-4,4'-diol

2-丁基吡咯烷

1,2,5,6,7,8-hexahydropyrrolizin-3-one