Cyclosporin H 

Chemical Name: Cyclosporin H ; 5-(N-Methyl-D-Valine) Cyclosporin A ; Cyclo[L-alanyl-D-alanyl-N-methyl-L-leucyl-N-methyl-L-leucyl-N-methyl-D-valyl-3-hydroxy-N,4-dimethyl-L-2-amino-6-octenoyl-L-2-aminobutanoyl-N-methylglycyl-N-methyl-L-leucyl-L-valyl-N-methyl-L-leucyl] ;

Synonym: Entecavir (R,R,R)-Isomer ; 2-amino-9-((1R,3R,4R)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-on

Smile: O=C([C@@H](C(C)C)N(C)C([C@H](CC(C)C)N(C)C([C@H](CC(C)C)N(C)C([C@@H](C)NC([C@H](C)NC([C@H](CC(C)C)N(C)C([C@H](C(C)C)NC([C@H](CC(C)C)N(C)C(CN(C)C([C@H](CC)N1)=O)=O)=O)=O)=O)=O)=O)=O)=O)N(C)[C@@H]([C@H](O)[C@H](C)C/C=C/C)C1=O