Table 1. Selected properties of synthetic compounds.

compound	R-isomer			S-isomer
	[α]D (°) a)	rt (min) b)	ee (%) b)	[α]D (°) a)	rt (min) b)	ee (%) b)
CCG-1423	+107	43.7 c)	>99.9	–103	31.2 c)	>99.9
CCG-100602	–78	8.8 d)	98.8	+79	5.4 d)	99.0
CCG-203971	–88	11.3 e)	99.0	+89	16.7 e)	99.1

^a) Measured in methanol; c 1; temperature: 27°C (CCG-1423), 25°C (CCG-100602 and CCG-203971).

^b) Determined by HPLC, column: 4.6Φ × 250 mm; eluent: n-hexane/ethanol; flow rate: 1 ml/min; temperature: 30°C; detection: UV254 nm.

^c) CHIRALPAK AD, n-hexane/ethanol = 200/3.

^d) CHIRALPAK AD, n-hexane/ethanol = 85/15.

^e) CHIRALPAK OD, n-hexane/ethanol = 85/15.