Gas chromatography/mass spectrometry and gas chromatography/mass spectrometry/mass spectrometry of methyl ester/methoxime/trimethylsilyl ether derivatives of thromboxanes

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Abstract
Electron impact mass spectra of methyl ester/methoxime/trimethylsilyl ether derivatives of thromboxane B2 (TxB2) and 2,3‐dinor‐TxB2 and methyl ester/trimethylsilyl ether derivative of 11‐dehydro‐TxB2 are presented. Additionally, the derivatives of (2H4)‐thromboxanes and methyl ester (2H3)‐methoxime/trimethylsilyl ether derivatives of TxB2 and 2,3‐dinor‐TxB2 and (2H3)‐methyl ester/trimethylsilyl ether derivative of 11‐dehydro‐TxB2 were investigated. Collision‐induced dissociation mass spectra of the most intense parent ion in the high‐mass region were taken. Collisionally activated decomposition mass spectra of the [C(12)–C(20)]+ ion of TxB2 and 2,3‐dinor‐TxB2 show an intense but not specific daughter ion, whereas the collison‐induced dissociation mass spectrum of the [M – (C(16)–C(20)]+ ion of 11‐dehydro‐TxB2 results in the formation of numerous daughter ions.

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