Keywords: N-Propyl-L-arginine.png own original caption i drew this anyone can use it 1 <br/>Transferred from http //en wikipedia org en wikipedia to Commons by User Logan using http //tools wikimedia de/~magnus/commonshelper php CommonsHelper 2008-07-19 Meodipt at http //en wikipedia org en wikipedia Meodipt PD-chem Original upload log page en wikipedia N-Propyl-L-arginine png 2008-07-19 06 49 Meodipt 586×220× 8025 bytes <nowiki>i drew this anyone can use it </nowiki> Guanidines Alpha-amino acids |