CAS No 14948-96-0 , 4-Nitrophenyl-N-acetyl-beta-D-galactosaminidep-Nitrophenyl-2-acetamido-2-deoxy-beta-D-galactoside4-Nitrophenyl-N-acetyl-beta-D-galactosaminidep-Nitrophenyl-2-acetamido-2-deoxy-beta-D-galactoside4-Nitrophenyl-N-acetyl-beta-D-galactosaminidep-Nitrophenyl-2-acetamido-2-deoxy-beta-D-galactoside4-Nitrophenyl-N-acetyl-beta-D-galactosaminidep-Nitrophenyl-2-acetamido-2-deoxy-beta-D-galactoside4-Nitrophenyl-N-acetyl-beta-D-galactosaminide