L-phenylalanine <=> (S)-3-amino-3-phenylpropanoate
l-phenylalanine <=> (s)-3-amino-3-phenylpropanoate
L-phenylalanine <=> (S)-3-amino-3-phenylpropanoate
l-phenylalanine <=> (s)-3-amino-3-phenylpropanoate