ethyl 3-[9-(3-ethoxy-3-oxopropyl)fluoren-9-yl]propanoate

9,9-二(3-氨基丙基)芴

methyl 3-[9-(3-methoxy-3-oxopropyl)fluoren-9-yl]propanoate

2-aminospiro[cyclohexene-5,9'-fluorene]-1-carbonitrile

spiro[cyclohexane-4,9'-fluorene]-1-one