4,4'-Dihydroxy-2,2,2',2',6,6,6',6'-octamethyl-1,1'-ethylenebispiperidine

二苯并呋喃

9-cyclohexylxanthen-9-ol

4,5-二溴-2,7-二叔丁基-9,9-二甲基呫吨

2,7-dinitroxanthen-9-one