OC, both identified by NMR. Hydrogenation of these compounds by means of Pd/C and precipitation of the resulting sulfonic acids in the form of the potassium salts from aqueous solution, as described for 21a above, yielded, after drying at 100 OC, 1.5 g of 21c, mp 180" C dec, as a dihydrate [Anal.(C1gH24KN308S2) C, H, N] and 1.6 g 21d, mp 168 OC dec, as a monohydrate [Anal.(CzoH24KN307Sz) C, H, Nl.