1-naphthaleneacetate synthetic auxin 1-naphthaleneacetic acid naphthalen-1-ylacetic acid alpha-naphthaleneacetic acid 1-Naphthylacetic acid A naphthylacetic acid substituted by a carboxymethyl group at position 1. naphthalen-1-ylacetic acid naphthalene-1-acetic acid 1-naphthaleneacetic acid NAA alpha-NAA (naphthalen-1-yl)acetic acid NAPHTHALEN-1-YL-ACETIC ACID naphthylacetic acid