... 219.20, 139 .50 , 117.40 268 .53 , 289 .50 , 354 .30, (322.40, 304 .53 ), 247.40, 2 15. 52, 190.20, 169.20, 110. 45 266 .52 , 114.30 389.74, 355 .51 , 321 .57 , 2 75. 59, 2 15. 3, 208. 45, 191.47, 174.41, 130.33, 116.24, ... (d) 1 15 116 Wide Spectra of Quality Control (e) (f) Study of Degradation Products and Degradation Pathways of ECD and Its Drug Product, ECD Kit (g) (h) 117 118 Wide Spectra of Quality Control ... 324.84 3 95. 83, 367.77, 349.47, 321.84, 280. 35, 268.20, 222.37 3 85. 30, 367.77, 339.79, 321 .51 , 311 .55 , 293.20, 279 .52 , 278.10, 252 .03, 222.42, 2 05. 38, 124.96 Table Major MS/MS fragments of ECD and...