1969691 L-NMMA NG-monomethyl-L-arginine 1539 2980717 L-NMA NG-monomethyl-L-arginine 43 2616851 MeArg NG-monomethyl-L-arginine 14 1254685 MLA omega-monomethyl-L-arginine 9 1960005 L-NAME N-monomethyl-L-arginine 3 1969690 LNMMA omega-monomethyl-L-arginine 2 1186910 L-NA omega-monomethyl-L-arginine 1