3122511 NHPI N-hydroxyphthalimide 146 1320164 NHP N-hydroxyphthalimide 28 1067703 HPI N-hydroxyphthalimide 4 2328647 HOPth N-hydroxyphthalimide 1 1070090 HPT N-hydroxyphthalimide 1 3122527 NHPH N-hydroxyphthalimide 1