1. Starý and co assigned as 1S (unchanging chiral centre in synthetic procedure)
2. ROESY ¹NMR effects establishes conformation+helicity as not .
3. Measured spectrum inherits (M,1S) assignment
4. Measured ORP of [α]₅₈₉=-674° inherits (M,1S)
   • Measured ORP of [α]₅₈₉=+540° for (P,1S) dominated by (P) not (S)

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