Spiro nonacyclic alkaloid cryptospirolepin

Later in 1995, 3 mm probe technology was again utilized in the characterization of an indolobenzazepine, homocryptolepinone (17),66 which may be a biosynthetic constituent of the spiro nonacyclic alkaloid cryptospirolepine (18) also produced by C. sanguinolenta.61... 

Three members of the relatively rare indoloquinoline family of alkaloids have been studied by the authors. These include cryptolepine (13), quindo-line (3), and the complex spiro-nonacyclic alkaloid cryptospirolepine (1). 

Cryptospirolepine. The elucidation of the structure of the novel, spiro-nonacyclic alkaloid cryptospirolepine (1) made extensive use of inverse-... 

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