L-phenylalanine
(S)-alpha-amino-beta-phenylpropionic acid

C9H11NO2

It's an amino acid.

Catabolism of phenylalanine, tyrosine and leucine (3D)
Synthesis of phenylalanine and tyrosine (3D)
Alkaloid biosynthesis (Kyoto University)
Aminoacyl-tRNA biosynthesis (Kyoto University)