| NAA | N-acetyl aspartate; naphthaleneacetic acid; neutral amino acid; neutron activation analysis; neutrop... |
|---|---|
| NBA | neuron-binding activity |
| NCA | National Certification Agency; National Council on Aging; National Council on Alcoholism; neurocircu... |
| NDA | National Dental Association; New Drug Application; no data available; no detectable activity; no det... |
| NGSA | nerve growth stimulating activity |