Abstract
Derivatives of psilocin with omega-functionalized alkyl spacers in position 1 of the indole ring were synthesized as haptens for use in a radioimmunoassay. Whereas the psilocin analogues with a 3-aminopropyl and a 4-aminobutyl moiety at the indole nitrogen decomposed during synthesis, the analogous 3-carboxypropyl psilocin derivative proved to be stable. This compound was coupled to bovine serum albumin (BSA) using the N-hydroxysuccinimide ester-mediated conjugation. The protein-hapten conjugate was characterized by matrix-assisted laser desorption ionization mass spectrometry. The mass spectrometry data indicated an average incorporation ratio of 4-5 molecules of psilocin hapten per molecule of BSA.
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