is_labelled is_partially_reacted is_side_product_of deuterium labelled ammonium amidated ammonium amidation cross-linker related chemical modification ammonium amidated BS3-d12 167.17035000000001332 C8 D12 H1 N1 O2 Deuterium labelled ammonium amidated bis(sulfosuccinimidyl) 2,2,3,3,4,4,5,5,6,6,7,7-suberate. XLMOD XLMOD:01052 DSG-d6