Robuta

https://www.rti.org/publication/synthesis-isomers-1r-3-phenylthio-tropane-2-carboxylic-acid-methyl-ester-new-class-ligands-dopamine
The syntheses of all four isomers of (1R)-3-(phenylthio)tropane-2-carboxylic acid methyl ester are described; the 2 beta,3 beta-isomer shows high affinity for...
synthesisisomerstropane
https://www.info.gov.hk/gia/general/201106/18/P201106180237.htm
chinese medicinal herbtropane alkaloidssuspectedpoisoningdue