1. Part IV of a series dealing with Derivatives of I-2H-Isoquinolone. For Part III, see reference 4e.
2. The authors gratefully acknowledge the financial support of this work by The Robert A. Welch Foundation, through Research Grant No. M-101.
3. Abstracted in part from the M. S. Theses of R. A. H. (now Mrs. R. A. Burks) and D. C. Y. (now Mrs. N. Y. Lee).
4. Notes-Tetrahydroisoquinolinediones. I. The Structure of 4-Hydroxyisocarbostyril
5. A Study of the Aminophthalimidoacetic Acids1