Degradation Characteristics of a Novel PAF Receptor Antagonist, SY0916, in Aqueous Solution

Table 1

Elemental composition of the D1 and D2 product ions.

Degradation products	Measured mass (m/z)	Calculated mass (m/z)	Proposed molecular formula	Error (ppm)	Proposed loss
D1	193.0412	193.0415	C11H10ClO^+	−1.55
	175.0299	175.0309	C11H8Cl^+	−5.71	-H2O
	158.0724	158.0726	C11H10O^+˙	−1.27	-Cl^˙
	130.0418	130.0413	C9H6O^+˙	3.84	-C2H4Cl^˙
	125.0151	125.0152	C7H6Cl^+	−0.80	-C4H4O
	115.0544	115.0542	C9H7^+	1.74	-C2H3OCl
	81.0333	81.0334	C5H5O^+	−1.23	-C6H5Cl
	53.0027	53.0022	C3HO^+	9.43	-C8H9Cl
D2	211.0519	211.0520	C11H12O2Cl^+	−0.47
	193.0412	193.0414	C11H10OCl^+	−1.04	-H2O
	165.0099	165.0101	C9H6OCl^+	−1.21	-H2O-C2H4
	137.0146	137.0152	C8H6Cl^+	−4.38	-H2O-C2H4-CO
	102.0461	102.0464	C8H6^+˙	−2.94	-H2O-C2H4-CO-Cl^˙
	73.0282	73.0284	C3H5O2^+	−2.74	-C8H7Cl