C+N_001C+N_002C+N_003C+N_004C+N_005C+N_006C+N_007C+N_008C+N_009C+N_010C+N_011C+N_012C+N_013C+N_014C+N_015C+N_016C+N_017C+N_018C+N_019C+N_020