intermediate
- gamma acid
- acetyl j acid
- phenyl j acid
- methyl j acid
- sulfo j acid
- 2-hydroxy naphthalene-6,8-disulfonic acid potassium salt (g salt)
- 2-hydroxy naphthalene-3,6-disulfonic acid sodium salt (r salt)
- 2,8-dihydroxy naphthalene-6-sulfonic acid sodium salt (dioxy g salt)
- 2,3-dihydroxy naphthalene-6-sulfonic acid sodium salt (dioxy r salt)