961.2 - Derivatives of guanidine are named (a) as substitution products of guanidine or (b), if the substituent carries a group to be cited as suffix, by use of the prefix "guanidino-" for the radical NH2-C(=NH)-NH-. Locants 1 and 3 are used for substituents of an NH2 group, and 2 for a substituent of the =NH group. If the position of the double bond is not proved, primes are used (where there is a choice, as few primes as possible). The group (NH2)2C=N- is named "diaminomethyleneamino-".
961.3 - Salts formed from guanidine and its derivatives are named as guanidinium salts. Locants for substituents are assigned as in Rule C-961.2.
Examples to Rule C-961.2
(When the position of the double bond is uncertain, the last compound is named N,N,N'-trimethylguanidine.)
(Diaminomethyleneamino) acetic acid
See Recommendations'93 Table 31(a)
Example to Rule C-961.3
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