Table 1. Molecular weights of the precursor and product ions⁻¹ of the metabolites and their deuterated internal standards selectively monitored by LC-tandem MS.

	Precursor	Product		Precursor	Product
Analog	ion−1m/z	ion−1m/z	Analog	ion−1m/z	ion−1m/z
PGE2	351	271	d7-5-oxo-ETE	324	210
d4-PGE2 a	355	275	LTB4	335	194.8
PGE3	349	269	d4-LTB4	339.2	196.8
PGD2	351	271	15-HETE	319	218.8
d4-PGD2	355	275	d8-15-HETE	327	225.7
5-HETE	319	115	12-HETE	319	179
d8-5-HETEb	327	115.8	d8-12-HETE	327	184
5-HEPE	317	115	13-HODE	295	194.7
5-oxo-ETE	317	203	d4-13-HODE	299	197.7

^aInternal standard for PGE₂ and PGE_3.

^bInternal standard for 5-HETE and 5-HEPE.