N-(hexadecanoyl)-sphing-4-enine-1-phosphocholine(in) = N-(hexadecanoyl)-sphing-4-enine-1-phosphocholine(out)
n-(hexadecanoyl)-sphing-4-enine-1-phosphocholine(in) = n-(hexadecanoyl)-sphing-4-enine-1-phosphocholine(out)