J. Org. Chem. 1 9 8 0 , 4 5 , 5 3 8 5 - 5 3 8 7 244 (M', 8), 199 (5),175 ( l o ) , 174 (86), 167 (3), 121 (48), 93 (21), 92 ( l o ) , 53 ( l o o ) , 52 (68).
5385 Scheme I
,II. U
Acknowledgment. This research was supported by NOAA Sea Grant Prqject 4-7-158-44067. Sea hares were collected by Mr. C. Ameson, University of Puerto Rico, Mayaguez. High-resolution mass spectra were provided by the mass spectrometry facility at the Massachusetts Institute of Technolobry, supported by a grant (principal investigator Professor I
