Claims
- 1. A compound of the formula II or IIa ##STR9## in which R.sup.15 and R.sup.16 are each phenylthio, 4-methylphenylthio, 4-methoxyphenylthio or 4-pyridylthio or in which R.sup.15 and R.sup.16 together are ##STR10## R.sup.11, R.sup.12, R.sup.13 and R.sup.14 are CH.sub.3 or F, and X is S, Se or Te.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1284/87 |
Apr 1987 |
CHX |
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Parent Case Info
This is a divisional of Ser. No. 494,061 filed Mar. 14, 1990, abandoned, which is a divisional of Ser. No. 172,880 filed Mar. 25, 1988 now U.S. Pat. No. 5,009,812 issued Apr. 23, 1991.
US Referenced Citations (9)
Divisions (2)
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Number |
Date |
Country |
Parent |
494061 |
Mar 1990 |
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Parent |
172880 |
Mar 1988 |
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