Adaba, Rosemary I.Mann, GregRaab, AndreaHoussen, Wael E.McEwan, Andrew R.Thomas, LouiseTabudravu, JiojiNaismith, James H.Jaspars, Marcel2017-11-172017-11-172016-12-29Adaba, R I, Mann, G, Raab, A, Houssen, W E, McEwan, A R, Thomas, L, Tabudravu, J, Naismith, J H & Jaspars, M 2016, 'Accurate quantification of modified cyclic peptides without the need for authentic standards', Tetrahedron, vol. 72, no. 52, pp. 8603-8609. https://doi.org/10.1016/j.tet.2016.11.0400040-4020ORCID: /0000-0003-2058-0105/work/72631019ORCID: /0000-0002-2426-6028/work/163664384http://hdl.handle.net/2164/9616Acknowledgments MJ, JHN, WEH, LT gratefully acknowledge support from the the Leverhulme Trust (RPG 2012-504). JT and AR were funded by EU-FP7 project ‘PharmaSea’ (contract 312184) and ARM and GM were funded by Scottish Enterprise High Growth Spinout ProgrammePS7305CA38.7527804engcyclic peptidesLC-MSICP-MSNMRquantification without authentic standardscyanobacteriaqNMRsolid-phase extractionelement mass-spectrometryliquid-chromatographyisotope-dilutionaffinity tagquantitative proteomicshuman plasmaabsolute quantificationlissoclinum-patellaprochloron-didemniQD ChemistryQDJournal article10.1016/j.tet.2016.11.0407252