TY - GEN AU - Setner,Bartosz AU - Szewczuk,Zbigniew TI - New ionization tags based on the structure of the 5-azoniaspiro[4.4]nonyl tag for a sensitive peptide sequencing by mass spectrometry SN - 1618-2650 PY - 2018///0502 KW - Amino Acid Sequence KW - Heterocyclic Compounds KW - chemistry KW - Peptides KW - Quaternary Ammonium Compounds KW - Spectrometry, Mass, Electrospray Ionization KW - methods N1 - Publication Type: Journal Article UR - https://doi.org/10.1007/s00216-017-0771-2 ER -