Figure 2.
Characteristic multiple doublet fingerprint patterns observable from steroidal compounds. Simulations of splitting patterns in various JH–H combinations: (a) 13.5, 4.0, 2.5 Hz; (b) 13.5, 5.0, 1.5 Hz; (c) 13.5, 6.5, 2.0, 1.5 Hz; (d) 13.5, 4.5, 4.5, 2.5 Hz; (e) 13.5, 12.5, 4.5, 0.5 Hz, and (f) 13.5, 13.5, 12.5, 4.0 Hz. Notice that the distinct splitting patterns are strictly dependent on the number and the “size” of JH–H values. For brevity, the JH–H values were divided into four categories that differed in size, i.e., large (14–10 Hz), medium-large (9–6 Hz), medium (5–3 Hz), and small (below 3 Hz). As revealed by the distinct splitting patterns, one can deduce the associated JH–H values accordingly; for details see text.