A compound of formula (I) wherein the bond between carbon atoms 22 and 23 may be a single or a double bond; R.sub.1 is C.sub.1-C.sub.12alkyl, C.sub.3-C.sub.8cycloalkyl, or C.sub.2-C.sub.12alkenyl; R.sub.2 and R.sub.3 are, for example, independently of each other hydrogen, C.sub.1-C.sub.12alkyl, C.sub.3-C.sub.12cycloalkyl, C.sub.2-C.sub.12alkenyl, C.sub.2-C.sub.12alkynyl, aryl or heteroaryl; and, where applicable, to E/Z isomers, mixtures of E/Z isomers, diastereomers and/or tautomers, in each case in free form or in salt form; pesticidal compositions in which the active ingredient has been selected from those compounds and their tautomers; and a method of controlling pests using those compositions are described.