The Alkaloids: Chemistry and Pharmacology
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... R4= R5= H(39) 118 R1= H, R2= R3= R4= R5= OCH3 (37, 40) 119 R1= R4=
R5= H, R2= R3= OCH3 (37) 120 R1= Ph; R2= R5= O2CPh; R3= R4= OCH3 (81)
121 122 123 124 125 CH3 R1 C * R3. 118 LUIS CASTEDO AND GABRIEL TOJO
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