文献索引：Morris, Janet L.; Rees, Charles W. Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1987 , p. 211 - 216
The only possible seven-membered ring compounds containing a carbon-carbon double bond and five sulfur atoms are 1, 2, 3, 4, 5-pentathiepin 1 and its derivatives. Many examples of the saturated system, 1, 2, 3, 4, 5-pentathiepan, and the 1, 2, 3, 4, 6-and 1, 2, 3,
