Appendix 1—table 2. HPLC Purity of final compounds.

Compound	Retention time	Purity [%]	HPLC method*
1	3.27 min	99	B
2	1.31 min	99	A
3	1.52 min	99	A
4	1.25 min	99	A
5	1.18 min	99	A
6	1.21 min	99	A
7	1.17 min	99	A

^*Method A: in 2.2 min from 100% A to 100% D, then staying on 100% D. Method B: in 7.5 min from 100% A to 100% D, then staying on 100% D.