A slashed zero cannot be confused with the letter O.

I have immortal longings in me.

I've got nish to say to you. You can save your breath.

1-Naphthylamine is reduced by sodium and isopentanol to ar-tetrahydro-1-naphthylamine; the prefix ar- is the abbreviation of aromatic and indicates that the four hydrogen atoms are not in the ring containing the amino-group: […]