3 nn 2 July 8, 2019 16 32 64 128 3 nn 2 n Nn 3 2024 Nn 3 24 N 3 )/ 2 formula Nn 3 23 Nn 3 22 Nn 3 21 Nn 3 2017 Nn 3 trimethyl 2 pentanamine Nn 3 h2 2 nh3 Pbm 3 240 nn